[知了堂学习笔记] SSM框架项目中遇到的问题及解决办法_01
程序员文章站
2024-01-15 22:25:58
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多参数传递问题
-
功能描述：需要得到页面的参数传入数据库，进行多条件查找
解决办法：在dao层对应的接口方法的参数前加上@Param(“XXX”)
前台界面传参至后台的问题
- 报错：At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
- 解决办法：
前台jsp页面代码：sid_message.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta>
<title></title>
<link type="text/css" href="../bootstrap/css/bootstrap.min.css" rel="stylesheet">
<link type="text/css" href="../css/theme.css" rel="stylesheet"/>
<script type="text/javascript" src="../scripts/jquery-3.2.1.js"></script>
<style type="text/css">
.title{
font-family: "微软雅黑";
font-size: larger;
}
</style>
</head>
<body>
<div style="height: 30px;">
<span class="title" style="margin-left: 10%;">用户信息</span>
<span class="title" style="margin-left: 35%;">密码重置</span>
</div>
<div>
<pre style="overflow-y: auto;height: 640px;">
<table style="margin-top: 0px;padding: 0px;margin-top: 0px;padding-top:0px ;" cellpadding="0" cellspacing="0" border="0" class="datatable-1 table table-bordered table-striped display">
<tbody id="sid_menu">
<c:forEach items="${userMessageList }" var="map">
<tr class="odd gradeA">
<td style="margin-left: 2%;">${map.username }</td>
<td style="margin-left: 2%;">${map.dept_name }</td>
<td style="margin-left: 2%;">${map.role_name }</td>
<td style="margin-left: 2%;"><input type="password" placeholder="请输入密码" class="sid_changepwd"/></td>
<td style="margin-left: 2%;"><input type="password" placeholder="请再次输入密码" class="sid_rechangepwd" ononblur="repwdBlur()"/></td>
<td style="margin-left: 2%;"><button class="btn btn-large btn-danger" onclick="updatePassword(this,${map.user_id })">确认</button></td>
<td style="margin-left: 2%;"><input type="reset" class="btn btn-large btn-danger" style="background-color:black;border-color:black" value="取消"></td>
</tr>
</c:forEach>
</tbody>
</table>
</pre>
</div>
<div style="margin-top: 2%;">
<span style="margin-left: 8%;"><input type="text" placeholder="按用户名选择查找" id="sid_choose_user"/></span>
<span style="margin-left: 8%;"><input type="text" placeholder="按用户部门选择查找" id="sid_choose_dept"/></span>
<span style="margin-left: 8%;"><input type="text" placeholder="按用户职位选择查找" id="sid_choose_role"/></span>
<span style="margin-left: 2%;"><button class="btn btn-small" style="margin-top: -8px;background-color: #333333;color: white;" id="sid_choose">确定</button></span>
</div>
</body>
<script type="text/javascript">
$(function(){
//多条件查询的点击事件
$("#sid_choose").click(function(){
var userChooseJson = {
"username": $("#sid_choose_user").val(),//填写的用户名
"deptname":$("#sid_choose_dept").val(),//填写的部门名称
"rolename":$("#sid_choose_role").val()//填写的角色名称
};//json对象
$.ajax({
type:'POST',
dataType:'json',
url:'../user/userMessageChoose.do',
contentType:'application/json;charset=UTF-8',//定义格式和编码
data:JSON.stringify(userChooseJson),//把json对象转为字符串传递给后台
success:function(data){
if(data == null || data == ""){
alert("无该信息！请重新输入关键字！");
}else{
var str = "";
$("#sid_menu").children().remove();
$.each(data,function(key,val){
str += '<tr class="odd gradeA">'
+'<td style="margin-left: 2%;">'+val.username+'</td>'
+'<td style="margin-left: 2%;">'+val.dept_name+'</td>'
+'<td style="margin-left: 2%;">'+val.role_name+'</td>'
+'<td style="margin-left: 2%;"><input type="password" placeholder="请输入密码" class="sid_changepwd"/></td>'
+'<td style="margin-left: 2%;"><input type="password" placeholder="请再次输入密码" class="sid_rechangepwd"/></td>'
+'<td style="margin-left: 2%;"><button class="btn btn-large btn-danger" onclick="updatePassword(this,${map.user_id })">确认</button></td>'
+'<td style="margin-left: 2%;"><input type="reset" class="btn btn-large btn-danger" style="background-color:black;border-color:black" value="取消"></td>'
+'</tr>';
});
$("#sid_menu").append(str);
$('input:reset').click(function(){
$('.sid_changepwd').val("");
$('.sid_rechangepwd').val("");
});
}
},
error:function(){
alert("无该数据！");
}
});
});
});
//修改密码的点击事件
function updatePassword(thisObj,user_id){
var password = $(thisObj).closest("tr").find(".sid_changepwd").val();//得到当前密码输入框的值
var repassword = $(thisObj).closest("tr").find(".sid_rechangepwd").val();//得到当前重复密码输入框的值
if(password == repassword){
//alert("相同");
$(function(){
var passwordJson = {
"user_id":user_id,
"password":password
};//将用户id和密码分装为json对象
$.ajax({
type:'POST',
dataType:'json',
url:'../user/editUserMessage.do',
contentType:'application/json;charset=UTF-8',//定义格式和编码
data:JSON.stringify(passwordJson),//把json对象转为字符串传递给后台
success:function(data){//回调函数
if(data == 1){
alert("修改成功！");
}else{
alert("修改失败！");
}
},
error:function(){
alert("失败");
}
});
});
}else{
alert("两次密码不相同！请重新输入密码！");
}
//alert(password);
//alert(repassword);
}
//取消修改的点击事件
//存在一个bug 点击任意一个取消按钮，所有input中的内容都会被清空
$(function(){
$('input:reset').click(function(){
$('.sid_changepwd').val("");//将密码输入框的值清空
$('.sid_rechangepwd').val("");//将驸马重复输入框中的值清空
});
});
</script>
</html>
后台控制层：UserController.java
package com.bbd.controller;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import com.bbd.model.UserModel;
import com.bbd.po.UserChooseJson;
import com.bbd.service.UserService;
/**
* SID界面--权限管理--信息修改--控制层
* @author Administrator
*
*/
@Controller
@RequestMapping("user")//给一个地址，用于访问
public class UserController {
@Resource
private UserService userService;
@RequestMapping("userMessageList")
public ModelAndView getUserMessage() {
List<Map<String, Object>> userMessageList = userService.getUserMessage();
ModelAndView mav = new ModelAndView("sid/sid_message","userMessageList",userMessageList);
return mav;
}
/**
* 通过@RequestBody接收参数
* @return
*/
@RequestMapping(value = "/userMessageChoose" , method = RequestMethod.POST)
public @ResponseBody List<Map<String, Object>> getUserMessageChoose(@RequestBody UserChooseJson userChooseJson) {
String username = userChooseJson.getUsername();
String deptname = userChooseJson.getDeptname();
String rolename = userChooseJson.getRolename();
//测试前台是否传回参数
//System.out.println(username+" "+deptname+" "+rolename);
List<Map<String, Object>> userMessageChoose = userService.getUserMessageChoose(username, deptname, rolename);
//测试返回的值
/*for(Map<String, Object> m: userMessageChoose) {
for(String k:m.keySet()) {
System.out.println(k+" : "+m.get(k));
}
}*/
return userMessageChoose;
}
/**
* 根据用户id修改用户密码
* @return
*/
@RequestMapping(value = "/editUserMessage" , method = RequestMethod.POST)
public @ResponseBody Integer editUserMessage(@RequestBody UserModel userModel) {
/* UserModel userModel1 = new UserModel(14001,"123456789");
System.out.println(userModel1.getUser_id()+" "+userModel1.getPassword());*/
Integer editState = userService.editUserMessage(userModel);
//System.out.println(editState);
return editState;
}
// 用于测试
/* @RequestMapping("editUserMessage")
public String test() {
String username = "";
String deptname = "";
String rolename = "SID";
//System.out.println(username);
List<Map<String, Object>> userMessageChoose = userService.getUserMessageChoose(username, deptname, rolename);
for(Map<String, Object> m: userMessageChoose) {
for(String k:m.keySet()) {
System.out.println(k+" : "+m.get(k));
}
}
UserModel userModel1 = new UserModel(14001,"123456789");
System.out.println(userModel1.getUser_id()+" "+userModel1.getPassword());
Integer editState = userService.editUserMessage(userModel1);
System.out.println(userService);
System.out.println(editState);
return "成功";
}*/
}
eclipse启动报错问题
-报错内容：
An internal error occurred during: “Initializing Java Tooling”.
解决办法：
1.删除当前工作目录下的WORKSPACE_HOME/.metadata/.plugins/org.eclipse.core.resources/.project，然后重新启动Eclipse
2. 由于我的项目使用了SVN管理，所以将要删除的项目下的.indexes和.syncinfo文件拷贝出来，重启后再将这两个文件拷贝回来，或者先close相应项目，再操作步骤1.