1# 系统属性<a name="ZH-CN_TOPIC_0000001210295633"></a> 2 3## 导入模块<a name="zh-cn_topic_0000001094819718_section370mcpsimp"></a> 4 5``` 6import parameter from '@ohos.systemParameter' 7``` 8 9## 权限列表<a name="zh-cn_topic_0000001094819718_section373mcpsimp"></a> 10 11无 12 13## 方法<a name="zh-cn_topic_0000001094819718_section1319529172015"></a> 14 15## getSync\(key: string, def?: string\)<a name="zh-cn_topic_0000001094819718_section3381192816421"></a> 16 17获取系统属性Key对应的值。 18 19**参数：** 20 21<a name="zh-cn_topic_0000001094819718_table14473145217456"></a> 22<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row1052235294518"><th class="cellrowborder" valign="top" width="11.219999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p15522195234514"><a name="zh-cn_topic_0000001094819718_p15522195234514"></a><a name="zh-cn_topic_0000001094819718_p15522195234514"></a>参数名</p> 23</th> 24<th class="cellrowborder" valign="top" width="13.270000000000001%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p1852285215454"><a name="zh-cn_topic_0000001094819718_p1852285215454"></a><a name="zh-cn_topic_0000001094819718_p1852285215454"></a>类型</p> 25</th> 26<th class="cellrowborder" valign="top" width="8.16%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p125221452154514"><a name="zh-cn_topic_0000001094819718_p125221452154514"></a><a name="zh-cn_topic_0000001094819718_p125221452154514"></a>必填</p> 27</th> 28<th class="cellrowborder" valign="top" width="67.35%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p552214521459"><a name="zh-cn_topic_0000001094819718_p552214521459"></a><a name="zh-cn_topic_0000001094819718_p552214521459"></a>说明</p> 29</th> 30</tr> 31</thead> 32<tbody><tr id="zh-cn_topic_0000001094819718_row165221352124511"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p85221523450"><a name="zh-cn_topic_0000001094819718_p85221523450"></a><a name="zh-cn_topic_0000001094819718_p85221523450"></a>key</p> 33</td> 34<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1452275204516"><a name="zh-cn_topic_0000001094819718_p1452275204516"></a><a name="zh-cn_topic_0000001094819718_p1452275204516"></a>string</p> 35</td> 36<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p1152275224511"><a name="zh-cn_topic_0000001094819718_p1152275224511"></a><a name="zh-cn_topic_0000001094819718_p1152275224511"></a>是</p> 37</td> 38<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p175228526455"><a name="zh-cn_topic_0000001094819718_p175228526455"></a><a name="zh-cn_topic_0000001094819718_p175228526455"></a>待查询的系统属性Key。</p> 39</td> 40</tr> 41<tr id="zh-cn_topic_0000001094819718_row12676182816132"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p567652819135"><a name="zh-cn_topic_0000001094819718_p567652819135"></a><a name="zh-cn_topic_0000001094819718_p567652819135"></a>def</p> 42</td> 43<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p156769289137"><a name="zh-cn_topic_0000001094819718_p156769289137"></a><a name="zh-cn_topic_0000001094819718_p156769289137"></a>string</p> 44</td> 45<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p96763289138"><a name="zh-cn_topic_0000001094819718_p96763289138"></a><a name="zh-cn_topic_0000001094819718_p96763289138"></a>否</p> 46</td> 47<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p16761628121319"><a name="zh-cn_topic_0000001094819718_p16761628121319"></a><a name="zh-cn_topic_0000001094819718_p16761628121319"></a>默认值。</p> 48</td> 49</tr> 50</tbody> 51</table> 52 53**返回值：** 54 55<a name="zh-cn_topic_0000001094819718_table1926815519481"></a> 56<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row92682052486"><th class="cellrowborder" valign="top" width="16.46%" id="mcps1.1.3.1.1"><p id="zh-cn_topic_0000001094819718_p326920564820"><a name="zh-cn_topic_0000001094819718_p326920564820"></a><a name="zh-cn_topic_0000001094819718_p326920564820"></a>类型</p> 57</th> 58<th class="cellrowborder" valign="top" width="83.54%" id="mcps1.1.3.1.2"><p id="zh-cn_topic_0000001094819718_p1126911514486"><a name="zh-cn_topic_0000001094819718_p1126911514486"></a><a name="zh-cn_topic_0000001094819718_p1126911514486"></a>说明</p> 59</th> 60</tr> 61</thead> 62<tbody><tr id="zh-cn_topic_0000001094819718_row12269165164818"><td class="cellrowborder" valign="top" width="16.46%" headers="mcps1.1.3.1.1 "><p id="zh-cn_topic_0000001094819718_p12269145144816"><a name="zh-cn_topic_0000001094819718_p12269145144816"></a><a name="zh-cn_topic_0000001094819718_p12269145144816"></a>string</p> 63</td> 64<td class="cellrowborder" valign="top" width="83.54%" headers="mcps1.1.3.1.2 "><p id="zh-cn_topic_0000001094819718_p026955154811"><a name="zh-cn_topic_0000001094819718_p026955154811"></a><a name="zh-cn_topic_0000001094819718_p026955154811"></a>系统属性值，若key不存在，返回默认值。若未指定默认值，返回空字符串。</p> 65</td> 66</tr> 67</tbody> 68</table> 69 70**示例：** 71 72``` 73try { 74 var info = parameter.getSync("test.parameter.key"); 75 console.log(JSON.stringify(info)); 76}catch(e){ 77 console.log("getSync unexpected error: " + e); 78} 79``` 80 81## get\(key: string, callback: AsyncCallback<string\>\)<a name="zh-cn_topic_0000001094819718_section19655131534912"></a> 82 83获取系统属性Key对应的值。 84 85**参数：** 86 87<a name="zh-cn_topic_0000001094819718_table76561515144911"></a> 88<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row165611155491"><th class="cellrowborder" valign="top" width="10.979547900968782%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p146561115114920"><a name="zh-cn_topic_0000001094819718_p146561115114920"></a><a name="zh-cn_topic_0000001094819718_p146561115114920"></a>参数名</p> 89</th> 90<th class="cellrowborder" valign="top" width="19.806243272335845%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p2656111554911"><a name="zh-cn_topic_0000001094819718_p2656111554911"></a><a name="zh-cn_topic_0000001094819718_p2656111554911"></a>类型</p> 91</th> 92<th class="cellrowborder" valign="top" width="5.930130149721108%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p12656121504916"><a name="zh-cn_topic_0000001094819718_p12656121504916"></a><a name="zh-cn_topic_0000001094819718_p12656121504916"></a>必填</p> 93</th> 94<th class="cellrowborder" valign="top" width="63.28407867697427%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p14656415104917"><a name="zh-cn_topic_0000001094819718_p14656415104917"></a><a name="zh-cn_topic_0000001094819718_p14656415104917"></a>说明</p> 95</th> 96</tr> 97</thead> 98<tbody><tr id="zh-cn_topic_0000001094819718_row46561715194912"><td class="cellrowborder" valign="top" width="10.979547900968782%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p11656715154910"><a name="zh-cn_topic_0000001094819718_p11656715154910"></a><a name="zh-cn_topic_0000001094819718_p11656715154910"></a>key</p> 99</td> 100<td class="cellrowborder" valign="top" width="19.806243272335845%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p66561515204914"><a name="zh-cn_topic_0000001094819718_p66561515204914"></a><a name="zh-cn_topic_0000001094819718_p66561515204914"></a>string</p> 101</td> 102<td class="cellrowborder" valign="top" width="5.930130149721108%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p065691514917"><a name="zh-cn_topic_0000001094819718_p065691514917"></a><a name="zh-cn_topic_0000001094819718_p065691514917"></a>是</p> 103</td> 104<td class="cellrowborder" valign="top" width="63.28407867697427%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p8656111544920"><a name="zh-cn_topic_0000001094819718_p8656111544920"></a><a name="zh-cn_topic_0000001094819718_p8656111544920"></a>待查询的系统属性Key。</p> 105</td> 106</tr> 107<tr id="zh-cn_topic_0000001094819718_row1263818717506"><td class="cellrowborder" valign="top" width="10.979547900968782%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p663817735014"><a name="zh-cn_topic_0000001094819718_p663817735014"></a><a name="zh-cn_topic_0000001094819718_p663817735014"></a>callback</p> 108</td> 109<td class="cellrowborder" valign="top" width="19.806243272335845%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p12638872501"><a name="zh-cn_topic_0000001094819718_p12638872501"></a><a name="zh-cn_topic_0000001094819718_p12638872501"></a>AsyncCallback<string></p> 110</td> 111<td class="cellrowborder" valign="top" width="5.930130149721108%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p863847125019"><a name="zh-cn_topic_0000001094819718_p863847125019"></a><a name="zh-cn_topic_0000001094819718_p863847125019"></a>是</p> 112</td> 113<td class="cellrowborder" valign="top" width="63.28407867697427%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p16638207205014"><a name="zh-cn_topic_0000001094819718_p16638207205014"></a><a name="zh-cn_topic_0000001094819718_p16638207205014"></a>回调函数。</p> 114</td> 115</tr> 116</tbody> 117</table> 118 119**返回值：** 120 121无 122 123**示例：** 124 125``` 126try { 127 parameter.get("test.parameter.key", function (err, data) { 128 if (err == undefined) { 129 console.log("get test.parameter.key value success:" + data) 130 } else { 131 console.log(" get test.parameter.key value err:" + err.code) 132 }}); 133}catch(e){ 134 console.log("get unexpected error: " + e); 135} 136``` 137 138## get\(key: string, def: string, callback: AsyncCallback<string\>\)<a name="zh-cn_topic_0000001094819718_section045334733915"></a> 139 140获取系统属性Key对应的值。 141 142**参数：** 143 144<a name="zh-cn_topic_0000001094819718_table1545354713914"></a> 145<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row11453184743918"><th class="cellrowborder" valign="top" width="11.219999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p045394710392"><a name="zh-cn_topic_0000001094819718_p045394710392"></a><a name="zh-cn_topic_0000001094819718_p045394710392"></a>参数名</p> 146</th> 147<th class="cellrowborder" valign="top" width="20.61%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p7453647113916"><a name="zh-cn_topic_0000001094819718_p7453647113916"></a><a name="zh-cn_topic_0000001094819718_p7453647113916"></a>类型</p> 148</th> 149<th class="cellrowborder" valign="top" width="6.18%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p745374763917"><a name="zh-cn_topic_0000001094819718_p745374763917"></a><a name="zh-cn_topic_0000001094819718_p745374763917"></a>必填</p> 150</th> 151<th class="cellrowborder" valign="top" width="61.99%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p13453847103918"><a name="zh-cn_topic_0000001094819718_p13453847103918"></a><a name="zh-cn_topic_0000001094819718_p13453847103918"></a>说明</p> 152</th> 153</tr> 154</thead> 155<tbody><tr id="zh-cn_topic_0000001094819718_row2453174773917"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p1545413471396"><a name="zh-cn_topic_0000001094819718_p1545413471396"></a><a name="zh-cn_topic_0000001094819718_p1545413471396"></a>key</p> 156</td> 157<td class="cellrowborder" valign="top" width="20.61%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p145416477394"><a name="zh-cn_topic_0000001094819718_p145416477394"></a><a name="zh-cn_topic_0000001094819718_p145416477394"></a>string</p> 158</td> 159<td class="cellrowborder" valign="top" width="6.18%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p15454124783916"><a name="zh-cn_topic_0000001094819718_p15454124783916"></a><a name="zh-cn_topic_0000001094819718_p15454124783916"></a>是</p> 160</td> 161<td class="cellrowborder" valign="top" width="61.99%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p645454720398"><a name="zh-cn_topic_0000001094819718_p645454720398"></a><a name="zh-cn_topic_0000001094819718_p645454720398"></a>待查询的系统属性Key。</p> 162</td> 163</tr> 164<tr id="zh-cn_topic_0000001094819718_row1586513411413"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p4866114116410"><a name="zh-cn_topic_0000001094819718_p4866114116410"></a><a name="zh-cn_topic_0000001094819718_p4866114116410"></a>def</p> 165</td> 166<td class="cellrowborder" valign="top" width="20.61%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p286618418410"><a name="zh-cn_topic_0000001094819718_p286618418410"></a><a name="zh-cn_topic_0000001094819718_p286618418410"></a>string</p> 167</td> 168<td class="cellrowborder" valign="top" width="6.18%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p148664412416"><a name="zh-cn_topic_0000001094819718_p148664412416"></a><a name="zh-cn_topic_0000001094819718_p148664412416"></a>是</p> 169</td> 170<td class="cellrowborder" valign="top" width="61.99%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p188663413413"><a name="zh-cn_topic_0000001094819718_p188663413413"></a><a name="zh-cn_topic_0000001094819718_p188663413413"></a>默认值。</p> 171</td> 172</tr> 173<tr id="zh-cn_topic_0000001094819718_row34546477396"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p1454134712395"><a name="zh-cn_topic_0000001094819718_p1454134712395"></a><a name="zh-cn_topic_0000001094819718_p1454134712395"></a>callback</p> 174</td> 175<td class="cellrowborder" valign="top" width="20.61%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p19454047123915"><a name="zh-cn_topic_0000001094819718_p19454047123915"></a><a name="zh-cn_topic_0000001094819718_p19454047123915"></a>AsyncCallback<string></p> 176</td> 177<td class="cellrowborder" valign="top" width="6.18%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p445454783919"><a name="zh-cn_topic_0000001094819718_p445454783919"></a><a name="zh-cn_topic_0000001094819718_p445454783919"></a>是</p> 178</td> 179<td class="cellrowborder" valign="top" width="61.99%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p1454124713391"><a name="zh-cn_topic_0000001094819718_p1454124713391"></a><a name="zh-cn_topic_0000001094819718_p1454124713391"></a>回调函数。</p> 180</td> 181</tr> 182</tbody> 183</table> 184 185**返回值：** 186 187无 188 189**示例：** 190 191``` 192try { 193 parameter.get("test.parameter.key", "default", function (err, data) { 194 if (err == undefined) { 195 console.log("get test.parameter.key value success:" + data) 196 } else { 197 console.log(" get test.parameter.key value err:" + err.code) 198 } 199 }); 200}catch(e){ 201 console.log("get unexpected error:" + e) 202} 203``` 204 205## get\(key: string, def?: string\)<a name="zh-cn_topic_0000001094819718_section10288162818402"></a> 206 207获取系统属性Key对应的值。 208 209**参数：** 210 211<a name="zh-cn_topic_0000001094819718_table1028882844020"></a> 212<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row132880285407"><th class="cellrowborder" valign="top" width="11.219999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p1828872816408"><a name="zh-cn_topic_0000001094819718_p1828872816408"></a><a name="zh-cn_topic_0000001094819718_p1828872816408"></a>参数名</p> 213</th> 214<th class="cellrowborder" valign="top" width="13.270000000000001%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p1328810281407"><a name="zh-cn_topic_0000001094819718_p1328810281407"></a><a name="zh-cn_topic_0000001094819718_p1328810281407"></a>类型</p> 215</th> 216<th class="cellrowborder" valign="top" width="8.16%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p72881628154019"><a name="zh-cn_topic_0000001094819718_p72881628154019"></a><a name="zh-cn_topic_0000001094819718_p72881628154019"></a>必填</p> 217</th> 218<th class="cellrowborder" valign="top" width="67.35%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p16288172814407"><a name="zh-cn_topic_0000001094819718_p16288172814407"></a><a name="zh-cn_topic_0000001094819718_p16288172814407"></a>说明</p> 219</th> 220</tr> 221</thead> 222<tbody><tr id="zh-cn_topic_0000001094819718_row52888288404"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p4288128194010"><a name="zh-cn_topic_0000001094819718_p4288128194010"></a><a name="zh-cn_topic_0000001094819718_p4288128194010"></a>key</p> 223</td> 224<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1528817286404"><a name="zh-cn_topic_0000001094819718_p1528817286404"></a><a name="zh-cn_topic_0000001094819718_p1528817286404"></a>string</p> 225</td> 226<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p62895286409"><a name="zh-cn_topic_0000001094819718_p62895286409"></a><a name="zh-cn_topic_0000001094819718_p62895286409"></a>是</p> 227</td> 228<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p4289142812409"><a name="zh-cn_topic_0000001094819718_p4289142812409"></a><a name="zh-cn_topic_0000001094819718_p4289142812409"></a>待查询的系统属性Key。</p> 229</td> 230</tr> 231<tr id="zh-cn_topic_0000001094819718_row828962817403"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p1289152874016"><a name="zh-cn_topic_0000001094819718_p1289152874016"></a><a name="zh-cn_topic_0000001094819718_p1289152874016"></a>def</p> 232</td> 233<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p228922815406"><a name="zh-cn_topic_0000001094819718_p228922815406"></a><a name="zh-cn_topic_0000001094819718_p228922815406"></a>string</p> 234</td> 235<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p19289428184020"><a name="zh-cn_topic_0000001094819718_p19289428184020"></a><a name="zh-cn_topic_0000001094819718_p19289428184020"></a>否</p> 236</td> 237<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p1428942818407"><a name="zh-cn_topic_0000001094819718_p1428942818407"></a><a name="zh-cn_topic_0000001094819718_p1428942818407"></a>默认值。</p> 238</td> 239</tr> 240</tbody> 241</table> 242 243**返回值：** 244 245<a name="zh-cn_topic_0000001094819718_table1644156114210"></a> 246<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row16441756114213"><th class="cellrowborder" valign="top" width="16.46%" id="mcps1.1.3.1.1"><p id="zh-cn_topic_0000001094819718_p564413569429"><a name="zh-cn_topic_0000001094819718_p564413569429"></a><a name="zh-cn_topic_0000001094819718_p564413569429"></a>类型</p> 247</th> 248<th class="cellrowborder" valign="top" width="83.54%" id="mcps1.1.3.1.2"><p id="zh-cn_topic_0000001094819718_p2644135684219"><a name="zh-cn_topic_0000001094819718_p2644135684219"></a><a name="zh-cn_topic_0000001094819718_p2644135684219"></a>说明</p> 249</th> 250</tr> 251</thead> 252<tbody><tr id="zh-cn_topic_0000001094819718_row126441156204215"><td class="cellrowborder" valign="top" width="16.46%" headers="mcps1.1.3.1.1 "><p id="zh-cn_topic_0000001094819718_p146441656144211"><a name="zh-cn_topic_0000001094819718_p146441656144211"></a><a name="zh-cn_topic_0000001094819718_p146441656144211"></a>Promise<string></p> 253</td> 254<td class="cellrowborder" valign="top" width="83.54%" headers="mcps1.1.3.1.2 "><p id="zh-cn_topic_0000001094819718_p2644115664211"><a name="zh-cn_topic_0000001094819718_p2644115664211"></a><a name="zh-cn_topic_0000001094819718_p2644115664211"></a>Promise示例，用于异步获取结果。</p> 255</td> 256</tr> 257</tbody> 258</table> 259 260**示例：** 261 262``` 263try { 264 var p = parameter.get("test.parameter.key"); 265 p.then(function (value) { 266 console.log("get test.parameter.key success: " + value); 267 }).catch(function (err) { 268 console.log("get test.parameter.key error: " + err.code); 269 }); 270}catch(e){ 271 console.log("get unexpected error: " + e); 272} 273``` 274 275## setSync\(key: string, value: string\)<a name="zh-cn_topic_0000001094819718_section63102185493"></a> 276 277设置系统属性Key对应的值。 278 279**参数：** 280 281<a name="zh-cn_topic_0000001094819718_table15310418174916"></a> 282<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row15311121811495"><th class="cellrowborder" valign="top" width="11.219999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p19311101814493"><a name="zh-cn_topic_0000001094819718_p19311101814493"></a><a name="zh-cn_topic_0000001094819718_p19311101814493"></a>参数名</p> 283</th> 284<th class="cellrowborder" valign="top" width="13.270000000000001%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p18311118204915"><a name="zh-cn_topic_0000001094819718_p18311118204915"></a><a name="zh-cn_topic_0000001094819718_p18311118204915"></a>类型</p> 285</th> 286<th class="cellrowborder" valign="top" width="8.16%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p11311131894919"><a name="zh-cn_topic_0000001094819718_p11311131894919"></a><a name="zh-cn_topic_0000001094819718_p11311131894919"></a>必填</p> 287</th> 288<th class="cellrowborder" valign="top" width="67.35%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p1131161804919"><a name="zh-cn_topic_0000001094819718_p1131161804919"></a><a name="zh-cn_topic_0000001094819718_p1131161804919"></a>说明</p> 289</th> 290</tr> 291</thead> 292<tbody><tr id="zh-cn_topic_0000001094819718_row183114182499"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p12311141816498"><a name="zh-cn_topic_0000001094819718_p12311141816498"></a><a name="zh-cn_topic_0000001094819718_p12311141816498"></a>key</p> 293</td> 294<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p931121804918"><a name="zh-cn_topic_0000001094819718_p931121804918"></a><a name="zh-cn_topic_0000001094819718_p931121804918"></a>string</p> 295</td> 296<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p10311161874910"><a name="zh-cn_topic_0000001094819718_p10311161874910"></a><a name="zh-cn_topic_0000001094819718_p10311161874910"></a>是</p> 297</td> 298<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p531161819498"><a name="zh-cn_topic_0000001094819718_p531161819498"></a><a name="zh-cn_topic_0000001094819718_p531161819498"></a>待设置的系统属性Key。</p> 299</td> 300</tr> 301<tr id="zh-cn_topic_0000001094819718_row11371940105211"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p713019471526"><a name="zh-cn_topic_0000001094819718_p713019471526"></a><a name="zh-cn_topic_0000001094819718_p713019471526"></a>value</p> 302</td> 303<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1213013472526"><a name="zh-cn_topic_0000001094819718_p1213013472526"></a><a name="zh-cn_topic_0000001094819718_p1213013472526"></a>string</p> 304</td> 305<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p18130104735216"><a name="zh-cn_topic_0000001094819718_p18130104735216"></a><a name="zh-cn_topic_0000001094819718_p18130104735216"></a>是</p> 306</td> 307<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p141301747155214"><a name="zh-cn_topic_0000001094819718_p141301747155214"></a><a name="zh-cn_topic_0000001094819718_p141301747155214"></a>待设置的系统属性值。</p> 308</td> 309</tr> 310</tbody> 311</table> 312 313**返回值：** 314 315无 316 317**示例：** 318 319``` 320try { 321 parameter.setSync("test.parameter.key", "default"); 322}catch(e){ 323 console.log("set unexpected error: " + e); 324} 325``` 326 327## set\(key: string, value: string, callback: AsyncCallback<void\>\)<a name="zh-cn_topic_0000001094819718_section18770184911197"></a> 328 329设置系统属性Key对应的值。 330 331**参数：** 332 333<a name="zh-cn_topic_0000001094819718_table97701049101914"></a> 334<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row977164981919"><th class="cellrowborder" valign="top" width="10.93141075604053%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p57712497198"><a name="zh-cn_topic_0000001094819718_p57712497198"></a><a name="zh-cn_topic_0000001094819718_p57712497198"></a>参数名</p> 335</th> 336<th class="cellrowborder" valign="top" width="16.630943102104442%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p1077184911195"><a name="zh-cn_topic_0000001094819718_p1077184911195"></a><a name="zh-cn_topic_0000001094819718_p1077184911195"></a>类型</p> 337</th> 338<th class="cellrowborder" valign="top" width="6.819953234606392%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p8771184913196"><a name="zh-cn_topic_0000001094819718_p8771184913196"></a><a name="zh-cn_topic_0000001094819718_p8771184913196"></a>必填</p> 339</th> 340<th class="cellrowborder" valign="top" width="65.61769290724864%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p1677116491196"><a name="zh-cn_topic_0000001094819718_p1677116491196"></a><a name="zh-cn_topic_0000001094819718_p1677116491196"></a>说明</p> 341</th> 342</tr> 343</thead> 344<tbody><tr id="zh-cn_topic_0000001094819718_row1771194916198"><td class="cellrowborder" valign="top" width="10.93141075604053%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p127713497196"><a name="zh-cn_topic_0000001094819718_p127713497196"></a><a name="zh-cn_topic_0000001094819718_p127713497196"></a>key</p> 345</td> 346<td class="cellrowborder" valign="top" width="16.630943102104442%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1777174912196"><a name="zh-cn_topic_0000001094819718_p1777174912196"></a><a name="zh-cn_topic_0000001094819718_p1777174912196"></a>string</p> 347</td> 348<td class="cellrowborder" valign="top" width="6.819953234606392%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p577164914199"><a name="zh-cn_topic_0000001094819718_p577164914199"></a><a name="zh-cn_topic_0000001094819718_p577164914199"></a>是</p> 349</td> 350<td class="cellrowborder" valign="top" width="65.61769290724864%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p27711349121916"><a name="zh-cn_topic_0000001094819718_p27711349121916"></a><a name="zh-cn_topic_0000001094819718_p27711349121916"></a>待查询的系统属性Key。</p> 351</td> 352</tr> 353<tr id="zh-cn_topic_0000001094819718_row117711549201917"><td class="cellrowborder" valign="top" width="10.93141075604053%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p87711149111911"><a name="zh-cn_topic_0000001094819718_p87711149111911"></a><a name="zh-cn_topic_0000001094819718_p87711149111911"></a>def</p> 354</td> 355<td class="cellrowborder" valign="top" width="16.630943102104442%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1977134961915"><a name="zh-cn_topic_0000001094819718_p1977134961915"></a><a name="zh-cn_topic_0000001094819718_p1977134961915"></a>string</p> 356</td> 357<td class="cellrowborder" valign="top" width="6.819953234606392%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p13771204911918"><a name="zh-cn_topic_0000001094819718_p13771204911918"></a><a name="zh-cn_topic_0000001094819718_p13771204911918"></a>是</p> 358</td> 359<td class="cellrowborder" valign="top" width="65.61769290724864%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p1177117490192"><a name="zh-cn_topic_0000001094819718_p1177117490192"></a><a name="zh-cn_topic_0000001094819718_p1177117490192"></a>默认值。</p> 360</td> 361</tr> 362<tr id="zh-cn_topic_0000001094819718_row17771124917194"><td class="cellrowborder" valign="top" width="10.93141075604053%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p207728494195"><a name="zh-cn_topic_0000001094819718_p207728494195"></a><a name="zh-cn_topic_0000001094819718_p207728494195"></a>callback</p> 363</td> 364<td class="cellrowborder" valign="top" width="16.630943102104442%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p2077274961913"><a name="zh-cn_topic_0000001094819718_p2077274961913"></a><a name="zh-cn_topic_0000001094819718_p2077274961913"></a>AsyncCallback<void></p> 365</td> 366<td class="cellrowborder" valign="top" width="6.819953234606392%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p15772184914197"><a name="zh-cn_topic_0000001094819718_p15772184914197"></a><a name="zh-cn_topic_0000001094819718_p15772184914197"></a>是</p> 367</td> 368<td class="cellrowborder" valign="top" width="65.61769290724864%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p1977244913198"><a name="zh-cn_topic_0000001094819718_p1977244913198"></a><a name="zh-cn_topic_0000001094819718_p1977244913198"></a>回调函数。</p> 369</td> 370</tr> 371</tbody> 372</table> 373 374**返回值：** 375 376无 377 378**示例：** 379 380``` 381try { 382 parameter.set("test.parameter.key", "testValue", function (err, data) { 383 if (err == undefined) { 384 console.log("set test.parameter.key value success :" + data) 385 } else { 386 console.log("set test.parameter.key value err:" + err.code) 387 }}); 388}catch(e){ 389 console.log("set unexpected error: " + e); 390} 391``` 392 393## set\(key: string, def?: string\)<a name="zh-cn_topic_0000001094819718_section187724496193"></a> 394 395设置系统属性Key对应的值。 396 397**参数：** 398 399<a name="zh-cn_topic_0000001094819718_table17724498192"></a> 400<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row277217498197"><th class="cellrowborder" valign="top" width="11.219999999999999%" id="mcps1.1.5.1.1"><p id="zh-cn_topic_0000001094819718_p57724491193"><a name="zh-cn_topic_0000001094819718_p57724491193"></a><a name="zh-cn_topic_0000001094819718_p57724491193"></a>参数名</p> 401</th> 402<th class="cellrowborder" valign="top" width="13.270000000000001%" id="mcps1.1.5.1.2"><p id="zh-cn_topic_0000001094819718_p6772134931918"><a name="zh-cn_topic_0000001094819718_p6772134931918"></a><a name="zh-cn_topic_0000001094819718_p6772134931918"></a>类型</p> 403</th> 404<th class="cellrowborder" valign="top" width="8.16%" id="mcps1.1.5.1.3"><p id="zh-cn_topic_0000001094819718_p577210499193"><a name="zh-cn_topic_0000001094819718_p577210499193"></a><a name="zh-cn_topic_0000001094819718_p577210499193"></a>必填</p> 405</th> 406<th class="cellrowborder" valign="top" width="67.35%" id="mcps1.1.5.1.4"><p id="zh-cn_topic_0000001094819718_p11773124941911"><a name="zh-cn_topic_0000001094819718_p11773124941911"></a><a name="zh-cn_topic_0000001094819718_p11773124941911"></a>说明</p> 407</th> 408</tr> 409</thead> 410<tbody><tr id="zh-cn_topic_0000001094819718_row677384921911"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p677317495199"><a name="zh-cn_topic_0000001094819718_p677317495199"></a><a name="zh-cn_topic_0000001094819718_p677317495199"></a>key</p> 411</td> 412<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p177731049131913"><a name="zh-cn_topic_0000001094819718_p177731049131913"></a><a name="zh-cn_topic_0000001094819718_p177731049131913"></a>string</p> 413</td> 414<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p777324918197"><a name="zh-cn_topic_0000001094819718_p777324918197"></a><a name="zh-cn_topic_0000001094819718_p777324918197"></a>是</p> 415</td> 416<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p13773849191918"><a name="zh-cn_topic_0000001094819718_p13773849191918"></a><a name="zh-cn_topic_0000001094819718_p13773849191918"></a>待查询的系统属性Key。</p> 417</td> 418</tr> 419<tr id="zh-cn_topic_0000001094819718_row13773114921911"><td class="cellrowborder" valign="top" width="11.219999999999999%" headers="mcps1.1.5.1.1 "><p id="zh-cn_topic_0000001094819718_p1777374951915"><a name="zh-cn_topic_0000001094819718_p1777374951915"></a><a name="zh-cn_topic_0000001094819718_p1777374951915"></a>def</p> 420</td> 421<td class="cellrowborder" valign="top" width="13.270000000000001%" headers="mcps1.1.5.1.2 "><p id="zh-cn_topic_0000001094819718_p1877394921916"><a name="zh-cn_topic_0000001094819718_p1877394921916"></a><a name="zh-cn_topic_0000001094819718_p1877394921916"></a>string</p> 422</td> 423<td class="cellrowborder" valign="top" width="8.16%" headers="mcps1.1.5.1.3 "><p id="zh-cn_topic_0000001094819718_p1177314917194"><a name="zh-cn_topic_0000001094819718_p1177314917194"></a><a name="zh-cn_topic_0000001094819718_p1177314917194"></a>否</p> 424</td> 425<td class="cellrowborder" valign="top" width="67.35%" headers="mcps1.1.5.1.4 "><p id="zh-cn_topic_0000001094819718_p7773204917199"><a name="zh-cn_topic_0000001094819718_p7773204917199"></a><a name="zh-cn_topic_0000001094819718_p7773204917199"></a>默认值。</p> 426</td> 427</tr> 428</tbody> 429</table> 430 431**返回值：** 432 433<a name="zh-cn_topic_0000001094819718_table14773154913191"></a> 434<table><thead align="left"><tr id="zh-cn_topic_0000001094819718_row877314991912"><th class="cellrowborder" valign="top" width="16.46%" id="mcps1.1.3.1.1"><p id="zh-cn_topic_0000001094819718_p1077313493199"><a name="zh-cn_topic_0000001094819718_p1077313493199"></a><a name="zh-cn_topic_0000001094819718_p1077313493199"></a>类型</p> 435</th> 436<th class="cellrowborder" valign="top" width="83.54%" id="mcps1.1.3.1.2"><p id="zh-cn_topic_0000001094819718_p1677411498195"><a name="zh-cn_topic_0000001094819718_p1677411498195"></a><a name="zh-cn_topic_0000001094819718_p1677411498195"></a>说明</p> 437</th> 438</tr> 439</thead> 440<tbody><tr id="zh-cn_topic_0000001094819718_row1977413496194"><td class="cellrowborder" valign="top" width="16.46%" headers="mcps1.1.3.1.1 "><p id="zh-cn_topic_0000001094819718_p67742498197"><a name="zh-cn_topic_0000001094819718_p67742498197"></a><a name="zh-cn_topic_0000001094819718_p67742498197"></a>Promise<string></p> 441</td> 442<td class="cellrowborder" valign="top" width="83.54%" headers="mcps1.1.3.1.2 "><p id="zh-cn_topic_0000001094819718_p4774164916199"><a name="zh-cn_topic_0000001094819718_p4774164916199"></a><a name="zh-cn_topic_0000001094819718_p4774164916199"></a>Promise示例，用于异步获取结果。</p> 443</td> 444</tr> 445</tbody> 446</table> 447 448**示例：** 449 450``` 451try { 452 var p = para.set("test.parameter.key", "testValue"); 453 p.then(function (value) { 454 console.log("set test.parameter.key success: " + value); 455 }).catch(function (err) { 456 console.log(" set test.parameter.key error: " + err.code); 457 }); 458}catch(e){ 459 console.log("set unexpected error: " + e); 460} 461``` 462 463