springmvc使用json数据传递到bootstrap分页数据
1、服务器将查出的数据，以json字符串的形式返回给浏览器
2、浏览器收到js字符串，可以使用js对json进行解析，使用js通过dom增删改变页面
3、在pom.xml中加入jackson依赖包。
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.8</version>
</dependency>
4、修改控制层返回数据的方式
package com.gwolf.crud.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.gwolf.crud.bean.Employee;
import com.gwolf.crud.service.EmployeeService;
@Controller
public class EmployeeController {
@Autowired
EmployeeService employeeService;
@RequestMapping("/emps")
@ResponseBody
public PageInfo<Employee> getEmpsWithJson(@RequestParam(value="pn",defaultValue="1") Integer pn,Model model) {
PageHelper.startPage(pn, 5);
List<Employee> employees = this.employeeService.getAll();
//传入连续显示的页数
PageInfo<Employee> pageInfo = new PageInfo<Employee>(employees,5);
return pageInfo;
}
}
5、访问http://localhost:8080/ssm-crud2/emps，
查看json数据是否正确返回。
6、新增的一个通用的数据返回类，这个类有操作的状态码。
package com.gwolf.crud.bean;
import java.util.HashMap;
import java.util.Map;
public class Msg implements java.io.Serializable{
//状态码：100-成功
private int code;
//提示信息
private String msg;
//用户返回给客户的数据
private Map<String,Object> extend = new HashMap();
public static Msg success() {
Msg result = new Msg();
result.setCode(100);
result.setMsg("处理成功!");
return result;
}
public static Msg fail() {
Msg result = new Msg();
result.setCode(200);
result.setMsg("处理失败!");
return result;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Map<String, Object> getExtend() {
return extend;
}
public void setExtend(Map<String, Object> extend) {
this.extend = extend;
}
public Msg add(String key,Object value) {
this.getExtend().put(key, value);
return this;
}
}
7、重新修改控制层返回数据的方法：
package com.gwolf.crud.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.gwolf.crud.bean.Employee;
import com.gwolf.crud.bean.Msg;
import com.gwolf.crud.service.EmployeeService;
@Controller
public class EmployeeController {
@Autowired
EmployeeService employeeService;
@RequestMapping("/emps")
@ResponseBody
public Msg getEmpsWithJson(@RequestParam(value="pn",defaultValue="1") Integer pn,Model model) {
PageHelper.startPage(pn, 5);
List<Employee> employees = this.employeeService.getAll();
//传入连续显示的页数
PageInfo<Employee> pageInfo = new PageInfo<Employee>(employees,5);
return Msg.success().add("pageInf", pageInfo);
}
}
