用ajax实现的jsp二级联动下拉列表

[{"title":"（ 17 个子文件 809KB ） 用ajax实现的jsp二级联动下拉列表","children":[{"title":"pcLink","children":[{"title":".project <span style='color:#111;'> 1.38KB </span>","children":null,"spread":false},{"title":".settings","children":[{"title":".jsdtscope <span style='color:#111;'> 500B </span>","children":null,"spread":false},{"title":"org.eclipse.core.resources.prefs <span style='color:#111;'> 108B </span>","children":null,"spread":false},{"title":"org.eclipse.wst.jsdt.ui.superType.container <span style='color:#111;'> 49B </span>","children":null,"spread":false},{"title":"org.eclipse.wst.jsdt.ui.superType.name <span style='color:#111;'> 6B </span>","children":null,"spread":false}],"spread":true},{"title":".mymetadata <span style='color:#111;'> 293B </span>","children":null,"spread":false},{"title":"WebRoot","children":[{"title":"WEB-INF","children":[{"title":"web.xml <span style='color:#111;'> 661B </span>","children":null,"spread":false},{"title":"lib","children":[{"title":"servlet-api.jar <span style='color:#111;'> 95.40KB </span>","children":null,"spread":false},{"title":"mysql-connector-java-5.1.7-bin.jar <span style='color:#111;'> 693.28KB </span>","children":null,"spread":false},{"title":"jsp-api.jar <span style='color:#111;'> 49.31KB </span>","children":null,"spread":false}],"spread":true},{"title":"classes","children":[{"title":"com","children":[{"title":"hailong","children":[{"title":"link","children":[{"title":"GetAllCitys.class <span style='color:#111;'> 3.88KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":"index.jsp <span style='color:#111;'> 416B </span>","children":null,"spread":false},{"title":"META-INF","children":[{"title":"MANIFEST.MF <span style='color:#111;'> 39B </span>","children":null,"spread":false}],"spread":true},{"title":"js","children":[{"title":"doGetCitysAjax.js <span style='color:#111;'> 2.75KB </span>","children":null,"spread":false}],"spread":true},{"title":"mysql.sql <span style='color:#111;'> 123.12KB </span>","children":null,"spread":false}],"spread":true},{"title":".myeclipse","children":null,"spread":false},{"title":"src","children":[{"title":"com","children":[{"title":"hailong","children":[{"title":"link","children":[{"title":"GetAllCitys.java <span style='color:#111;'> 2.60KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":".classpath <span style='color:#111;'> 577B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]