基于jquery ui的autocomplete(乱码处理,下拉列表内容)

最终效果图:

所需jar包列表:commons-beanutils-1.8.3.jar,commons-collections-3.2.1.jar,commons-lang-2.5.jar,commons-logging-1.1.1.jar,ezmorph-1.0.6.jar,json-lib-2.1.jar

 

jquery.ui.autocomplete.js 关键的地方已经写了注释

 

/*
 * jQuery UI Autocomplete 1.8.13
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Autocomplete
 *
 * Depends:
 *	jquery.ui.core.js
 *	jquery.ui.widget.js
 *	jquery.ui.position.js
 */
(function( $, undefined ) {

// used to prevent race conditions with remote data sources
var requestIndex = 0;
//minLength:输入多少个字符后开始自动完成
//delay:延迟
$.widget( "ui.autocomplete", {
	options: {
		appendTo: "body",
		autoFocus: false,
		delay: 300,
		minLength: 1,
		position: {
			my: "left top",
			at: "left bottom",
			collision: "none"
		},
		source: null
	},

	pending: 0,

	_create: function() {
		var self = this,
			doc = this.element[ 0 ].ownerDocument,
			suppressKeyPress;

		this.element
			.addClass( "ui-autocomplete-input" )
			.attr( "autocomplete", "off" )
			// TODO verify these actually work as intended
			.attr({
				role: "textbox",
				"aria-autocomplete": "list",
				"aria-haspopup": "true"
			})
			.bind( "keydown.autocomplete", function( event ) {
				if ( self.options.disabled || self.element.attr( "readonly" ) ) {
					return;
				}

				suppressKeyPress = false;
				var keyCode = $.ui.keyCode;
				switch( event.keyCode ) {
				case keyCode.PAGE_UP:
					self._move( "previousPage", event );
					break;
				case keyCode.PAGE_DOWN:
					self._move( "nextPage", event );
					break;
				case keyCode.UP:
					self._move( "previous", event );
					// prevent moving cursor to beginning of text field in some browsers
					event.preventDefault();
					break;
				case keyCode.DOWN:
					self._move( "next", event );
					// prevent moving cursor to end of text field in some browsers
					event.preventDefault();
					break;
				case keyCode.ENTER:
				case keyCode.NUMPAD_ENTER:
					// when menu is open and has focus
					if ( self.menu.active ) {
						// #6055 - Opera still allows the keypress to occur
						// which causes forms to submit
						suppressKeyPress = true;
						event.preventDefault();
					}
					//passthrough - ENTER and TAB both select the current element
				case keyCode.TAB:
					if ( !self.menu.active ) {
						return;
					}
					self.menu.select( event );
					break;
				case keyCode.ESCAPE:
					self.element.val( self.term );
					self.close( event );
					break;
				default:
					// keypress is triggered before the input value is changed
					clearTimeout( self.searching );
					self.searching = setTimeout(function() {
						// only search if the value has changed
						if ( self.term != self.element.val() ) {
							self.selectedItem = null;
							self.search( null, event );
						}
					}, self.options.delay );
					break;
				}
			})
			.bind( "keypress.autocomplete", function( event ) {
				if ( suppressKeyPress ) {
					suppressKeyPress = false;
					event.preventDefault();
				}
			})
			.bind( "focus.autocomplete", function() {
				if ( self.options.disabled ) {
					return;
				}

				self.selectedItem = null;
				self.previous = self.element.val();
			})
			.bind( "blur.autocomplete", function( event ) {
				if ( self.options.disabled ) {
					return;
				}

				clearTimeout( self.searching );
				// clicks on the menu (or a button to trigger a search) will cause a blur event
				self.closing = setTimeout(function() {
					self.close( event );
					self._change( event );
				}, 150 );
			});
		this._initSource();
		this.response = function() {
			return self._response.apply( self, arguments );
		};
		this.menu = $( "<ul></ul>" )
			.addClass( "ui-autocomplete" )
			.appendTo( $( this.options.appendTo || "body", doc )[0] )
			// prevent the close-on-blur in case of a "slow" click on the menu (long mousedown)
			.mousedown(function( event ) {
				// clicking on the scrollbar causes focus to shift to the body
				// but we can't detect a mouseup or a click immediately afterward
				// so we have to track the next mousedown and close the menu if
				// the user clicks somewhere outside of the autocomplete
				var menuElement = self.menu.element[ 0 ];
				if ( !$( event.target ).closest( ".ui-menu-item" ).length ) {
					setTimeout(function() {
						$( document ).one( 'mousedown', function( event ) {
							if ( event.target !== self.element[ 0 ] &&
								event.target !== menuElement &&
								!$.ui.contains( menuElement, event.target ) ) {
								self.close();
							}
						});
					}, 1 );
				}

				// use another timeout to make sure the blur-event-handler on the input was already triggered
				setTimeout(function() {
					clearTimeout( self.closing );
				}, 13);
			})
			.menu({
				focus: function( event, ui ) {
					var item = ui.item.data( "item.autocomplete" );
					if ( false !== self._trigger( "focus", event, { item: item } ) ) {
						// use value to match what will end up in the input, if it was a key event
						if ( /^key/.test(event.originalEvent.type) ) {
							self.element.val( item.value );
						}
					}
				},
				selected: function( event, ui ) {
					var item = ui.item.data( "item.autocomplete" ),
						previous = self.previous;

					// only trigger when focus was lost (click on menu)
					if ( self.element[0] !== doc.activeElement ) {
						self.element.focus();
						self.previous = previous;
						// #6109 - IE triggers two focus events and the second
						// is asynchronous, so we need to reset the previous
						// term synchronously and asynchronously :-(
						setTimeout(function() {
							self.previous = previous;
							self.selectedItem = item;
						}, 1);
					}

					if ( false !== self._trigger( "select", event, { item: item } ) ) {
						//console.debug("userId:" + item.id);
						//下拉框中的内容被选中后
						//设置hidden的值,item为json数组中的每一项
						$("#uid").attr("value", item.id);
						//设置text的值为选中项的value值
						self.element.val( item.value );
					}
					// reset the term after the select event
					// this allows custom select handling to work properly
					self.term = self.element.val();

					self.close( event );
					self.selectedItem = item;
				},
				blur: function( event, ui ) {
					// don't set the value of the text field if it's already correct
					// this prevents moving the cursor unnecessarily
					if ( self.menu.element.is(":visible") &&
						( self.element.val() !== self.term ) ) {
						self.element.val( self.term );
					}
				}
			})
			.zIndex( this.element.zIndex() + 1 )
			// workaround for jQuery bug #5781 http://dev.jquery.com/ticket/5781
			.css({ top: 0, left: 0 })
			.hide()
			.data( "menu" );
		if ( $.fn.bgiframe ) {
			 this.menu.element.bgiframe();
		}
	},

	destroy: function() {
		this.element
			.removeClass( "ui-autocomplete-input" )
			.removeAttr( "autocomplete" )
			.removeAttr( "role" )
			.removeAttr( "aria-autocomplete" )
			.removeAttr( "aria-haspopup" );
		this.menu.element.remove();
		$.Widget.prototype.destroy.call( this );
	},

	_setOption: function( key, value ) {
		$.Widget.prototype._setOption.apply( this, arguments );
		if ( key === "source" ) {
			this._initSource();
		}
		if ( key === "appendTo" ) {
			this.menu.element.appendTo( $( value || "body", this.element[0].ownerDocument )[0] )
		}
		if ( key === "disabled" && value && this.xhr ) {
			this.xhr.abort();
		}
	},

	_initSource: function() {
		var self = this,
			array,
			url;
		if ( $.isArray(this.options.source) ) {
			array = this.options.source;
			this.source = function( request, response ) {
				response( $.ui.autocomplete.filter(array, request.term) );
			};
		} else if ( typeof this.options.source === "string" ) {
			url = this.options.source;
			this.source = function( request, response ) {
				if ( self.xhr ) {
					self.xhr.abort();
				}
				self.xhr = $.ajax({
					url: url,
					data: request,
					dataType: "json",
					autocompleteRequest: ++requestIndex,
					success: function( data, status ) {
						if ( this.autocompleteRequest === requestIndex ) {
							response( data );
						}
					},
					error: function() {
						if ( this.autocompleteRequest === requestIndex ) {
							response( [] );
						}
					}
				});
			};
		} else {
			this.source = this.options.source;
		}
	},

	search: function( value, event ) {
		value = value != null ? value : this.element.val();

		//中文处理,在这里进行encode,在后台decode,即可解决乱码问题
		value = encodeURI(value);
		
		// always save the actual value, not the one passed as an argument
		this.term = this.element.val();

		if ( value.length < this.options.minLength ) {
			return this.close( event );
		}

		clearTimeout( this.closing );
		if ( this._trigger( "search", event ) === false ) {
			return;
		}

		return this._search( value );
	},

	_search: function( value ) {
		this.pending++;
		this.element.addClass( "ui-autocomplete-loading" );

		this.source( { term: value }, this.response );
	},

	_response: function( content ) {
		if ( !this.options.disabled && content && content.length ) {
			content = this._normalize( content );
			this._suggest( content );
			this._trigger( "open" );
		} else {
			this.close();
		}
		this.pending--;
		if ( !this.pending ) {
			this.element.removeClass( "ui-autocomplete-loading" );
		}
	},

	close: function( event ) {
		clearTimeout( this.closing );
		if ( this.menu.element.is(":visible") ) {
			this.menu.element.hide();
			this.menu.deactivate();
			this._trigger( "close", event );
		}
	},
	
	_change: function( event ) {
		if ( this.previous !== this.element.val() ) {
			this._trigger( "change", event, { item: this.selectedItem } );
		}
	},

	_normalize: function( items ) {
		// assume all items have the right format when the first item is complete
		if ( items.length && items[0].label && items[0].value ) {
			return items;
		}
		return $.map( items, function(item) {
			if ( typeof item === "string" ) {
				return {
					label: item,
					value: item
				};
			}
			return $.extend({
				label: item.label || item.value,
				value: item.value || item.label
			}, item );
		});
	},

	_suggest: function( items ) {
		var ul = this.menu.element
			.empty()
			.zIndex( this.element.zIndex() + 1 );
		this._renderMenu( ul, items );
		// TODO refresh should check if the active item is still in the dom, removing the need for a manual deactivate
		this.menu.deactivate();
		this.menu.refresh();

		// size and position menu
		ul.show();
		this._resizeMenu();
		ul.position( $.extend({
			of: this.element
		}, this.options.position ));

		if ( this.options.autoFocus ) {
			this.menu.next( new $.Event("mouseover") );
		}
	},

	_resizeMenu: function() {
		var ul = this.menu.element;
		ul.outerWidth( Math.max(
			ul.width( "" ).outerWidth(),
			this.element.outerWidth()
		) );
	},

	_renderMenu: function( ul, items ) {
		var self = this;
		$.each( items, function( index, item ) {
			self._renderItem( ul, item );
		});
	},

	_renderItem: function( ul, item) {
		return $( "<li></li>" )
			.data( "item.autocomplete", item )
			//.html:解析html标签,.text:不解析html标签,根据项目需要选择
			.append( $( "<a></a>" ).html( item.label ) )
			.appendTo( ul );
	},

	_move: function( direction, event ) {
		if ( !this.menu.element.is(":visible") ) {
			this.search( null, event );
			return;
		}
		if ( this.menu.first() && /^previous/.test(direction) ||
				this.menu.last() && /^next/.test(direction) ) {
			this.element.val( this.term );
			this.menu.deactivate();
			return;
		}
		this.menu[ direction ]( event );
	},

	widget: function() {
		return this.menu.element;
	}
});

$.extend( $.ui.autocomplete, {
	escapeRegex: function( value ) {
		return value.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
	},
	filter: function(array, term) {
		var matcher = new RegExp( $.ui.autocomplete.escapeRegex(term), "i" );
		return $.grep( array, function(value) {
			return matcher.test( value.label || value.value || value );
		});
	}
});

}( jQuery ));

/*
 * jQuery UI Menu (not officially released)
 * 
 * This widget isn't yet finished and the API is subject to change. We plan to finish
 * it for the next release. You're welcome to give it a try anyway and give us feedback,
 * as long as you're okay with migrating your code later on. We can help with that, too.
 *
 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Menu
 *
 * Depends:
 *	jquery.ui.core.js
 *  jquery.ui.widget.js
 */
(function($) {

$.widget("ui.menu", {
	_create: function() {
		var self = this;
		this.element
			.addClass("ui-menu ui-widget ui-widget-content ui-corner-all")
			.attr({
				role: "listbox",
				"aria-activedescendant": "ui-active-menuitem"
			})
			.click(function( event ) {
				if ( !$( event.target ).closest( ".ui-menu-item a" ).length ) {
					return;
				}
				// temporary
				event.preventDefault();
				self.select( event );
			});
		this.refresh();
	},
	
	refresh: function() {
		var self = this;

		// don't refresh list items that are already adapted
		var items = this.element.children("li:not(.ui-menu-item):has(a)")
			.addClass("ui-menu-item")
			.attr("role", "menuitem");
		
		items.children("a")
			.addClass("ui-corner-all")
			.attr("tabindex", -1)
			// mouseenter doesn't work with event delegation
			.mouseenter(function( event ) {
				self.activate( event, $(this).parent() );
			})
			.mouseleave(function() {
				self.deactivate();
			});
	},

	activate: function( event, item ) {
		this.deactivate();
		if (this.hasScroll()) {
			var offset = item.offset().top - this.element.offset().top,
				scroll = this.element.scrollTop(),
				elementHeight = this.element.height();
			if (offset < 0) {
				this.element.scrollTop( scroll + offset);
			} else if (offset >= elementHeight) {
				this.element.scrollTop( scroll + offset - elementHeight + item.height());
			}
		}
		this.active = item.eq(0)
			.children("a")
				.addClass("ui-state-hover")
				.attr("id", "ui-active-menuitem")
			.end();
		this._trigger("focus", event, { item: item });
	},

	deactivate: function() {
		if (!this.active) { return; }

		this.active.children("a")
			.removeClass("ui-state-hover")
			.removeAttr("id");
		this._trigger("blur");
		this.active = null;
	},

	next: function(event) {
		this.move("next", ".ui-menu-item:first", event);
	},

	previous: function(event) {
		this.move("prev", ".ui-menu-item:last", event);
	},

	first: function() {
		return this.active && !this.active.prevAll(".ui-menu-item").length;
	},

	last: function() {
		return this.active && !this.active.nextAll(".ui-menu-item").length;
	},

	move: function(direction, edge, event) {
		if (!this.active) {
			this.activate(event, this.element.children(edge));
			return;
		}
		var next = this.active[direction + "All"](".ui-menu-item").eq(0);
		if (next.length) {
			this.activate(event, next);
		} else {
			this.activate(event, this.element.children(edge));
		}
	},

	// TODO merge with previousPage
	nextPage: function(event) {
		if (this.hasScroll()) {
			// TODO merge with no-scroll-else
			if (!this.active || this.last()) {
				this.activate(event, this.element.children(".ui-menu-item:first"));
				return;
			}
			var base = this.active.offset().top,
				height = this.element.height(),
				result = this.element.children(".ui-menu-item").filter(function() {
					var close = $(this).offset().top - base - height + $(this).height();
					// TODO improve approximation
					return close < 10 && close > -10;
				});

			// TODO try to catch this earlier when scrollTop indicates the last page anyway
			if (!result.length) {
				result = this.element.children(".ui-menu-item:last");
			}
			this.activate(event, result);
		} else {
			this.activate(event, this.element.children(".ui-menu-item")
				.filter(!this.active || this.last() ? ":first" : ":last"));
		}
	},

	// TODO merge with nextPage
	previousPage: function(event) {
		if (this.hasScroll()) {
			// TODO merge with no-scroll-else
			if (!this.active || this.first()) {
				this.activate(event, this.element.children(".ui-menu-item:last"));
				return;
			}

			var base = this.active.offset().top,
				height = this.element.height();
				result = this.element.children(".ui-menu-item").filter(function() {
					var close = $(this).offset().top - base + height - $(this).height();
					// TODO improve approximation
					return close < 10 && close > -10;
				});

			// TODO try to catch this earlier when scrollTop indicates the last page anyway
			if (!result.length) {
				result = this.element.children(".ui-menu-item:first");
			}
			this.activate(event, result);
		} else {
			this.activate(event, this.element.children(".ui-menu-item")
				.filter(!this.active || this.first() ? ":last" : ":first"));
		}
	},

	hasScroll: function() {
		return this.element.height() < this.element[ $.fn.prop ? "prop" : "attr" ]("scrollHeight");
	},

	select: function( event ) {
		this._trigger("selected", event, { item: this.active });
	}
});

}(jQuery));

 
 JSP页面:index.jsp

 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>test auto complete</title>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">
	<link rel="stylesheet" type="text/css" href="js/jqueryui/jquery-ui-1.8.13.custom.css">
	
	<script type="text/javascript" src="js/jquery1.4.4.min.js"></script>
	<script type="text/javascript" src="js/jqueryui/jquery.ui.core.min.js"></script>
	<script type="text/javascript" src="js/jqueryui/jquery.ui.widget.min.js"></script>
	<script type="text/javascript" src="js/jqueryui/jquery.ui.position.min.js"></script>
	<script type="text/javascript" src="js/jqueryui/jquery.ui.autocomplete.js"></script>
	
	<style type="text/css">
	<%--	loading图片		--%>
	.ui-autocomplete-loading { background: white url('js/jqueryui/images/ui-anim_basic_16x16.gif') right center no-repeat; }
	.ui-widget .ui-corner-all{ height:30px; vertical-align: top;}
	.ui-autocomplete {
		max-height: 108px;
		overflow-y: auto;
		/* 防止出现水平滚动条 */
		overflow-x: hidden;
		/* 内容与右侧滚动条的距离 */
		padding-right: 0px;
	}
	/* IE 6 不支持 max-height,用height代替 */
	* html .ui-autocomplete {
		height: 130px;
	}
	</style>
	
  </head>
  
  <body>
	<script type="text/javascript">
	$(function() {
		var cache = {},
			lastXhr;
		$( "#nickName" ).autocomplete({
			minLength: 1,
			source: function( request, response ) {
				var term = request.term;
				if ( term in cache ) {
					response( cache[ term ] );
					return;
				}
				
				var params = {
						"nickName" : term
				};

				lastXhr = $.getJSON("SearchServlet", params, function( data, status, xhr ) {
					cache[ term ] = data;
					if ( xhr === lastXhr ) {
						response( data );
					}
				});
			}
		});
	});
	</script>


	<div class="ui-widget">
		<%--为了演示方便,采用get方式,在地址栏可以看到参数 --%>
		<form id="form1" name="form1" method="get" action="sendMessage.action">
		<input type="hidden" name="uid" id="uid"/>
		<label for="nickName">昵称: </label>
		<input id="nickName" type="text" name="nickName" style="width:250px;"/>
		<input type="submit" value="发送"/>
		</form>
	</div>
  </body>
</html>

 后台代码

User.java

 

package com.gary.test.entity;

import java.io.Serializable;

/**
 * 用户信息
 * @author gary
 *
 */
public class User implements Serializable{

	private static final long serialVersionUID = 1L;
	
	private Integer id;
	private String nickName;
	private String password;
	private String gravatar;
	private Short gender;
	
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getGravatar() {
		return gravatar;
	}
	public void setGravatar(String gravatar) {
		this.gravatar = gravatar;
	}
	public void setGender(Short gender) {
		this.gender = gender;
	}
	public Short getGender() {
		return gender;
	}
	public void setNickName(String nickName) {
		this.nickName = nickName;
	}
	public String getNickName() {
		return nickName;
	}
	
	public User(Integer id, String nickName, String password, String gravatar,
			Short gender) {
		super();
		this.id = id;
		this.nickName = nickName;
		this.password = password;
		this.gravatar = gravatar;
		this.gender = gender;
	}
}

 UserDTO.java

 

package com.gary.test.util;

/**
 * 用户信息DTO
 * @author gary
 *
 */
public class UserDTO {
	//input hidden中的用户ID
	private Integer id;
	//下拉列表显示内容
	private String label;
	//下拉列表选中后,input text中显示的内容
	private String value;
	
	public UserDTO(Integer id, String label, String value) {
		this.id = id;
		this.label = label;
		this.value = value;
	}
	
	public String getLabel() {
		return label;
	}
	public void setLabel(String label) {
		this.label = label;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public Integer getId() {
		return id;
	}
}

 AutoCompleteUtil.java

 

package com.gary.test.util;

import java.util.ArrayList;
import java.util.List;

import com.gary.test.entity.User;

/**
 * 自动完成工具
 * @author gary
 *
 */
public class AutoCompleteUtil {
	
	/**
	 * 转化数据,entity to dto
	 * @param userList
	 * @return
	 */
	public static List<UserDTO> convert(List<User> userList){
		List<UserDTO> resultList = new ArrayList<UserDTO>();
		
		int imgWidth = 30;
		int imgHeight = 30;

		//图片标签前缀
		final String imgTagPrefix = "<img src=\"images/";
		//图片标签后缀
		final String imgTagPostfix = "\" border=\"0\" width=\"" + imgWidth + "px;\" height=\"" + imgHeight + "px;\" />";

		
		int namePaddingLeft = 15;
		//昵称
		final String nameTagPrefix = "<span style=\"padding-left:" + namePaddingLeft + "px; vertical-align: top;\">";
		final String nameTagPostfix = "</span>";
		
		int genderPaddingLeft = 15;
		//性别
		final String genderTagPrefix = "<span style=\"padding-left:" + genderPaddingLeft + "px; vertical-align: top;\">";
		final String genderTagPostfix = "</span>";
		
		
		for (User ui : userList) {
			StringBuffer label = new StringBuffer();
			label.append(imgTagPrefix);
			label.append(ui.getGravatar());
			label.append(imgTagPostfix);
			
			label.append(nameTagPrefix);
			label.append(ui.getNickName());
			label.append(nameTagPostfix);
			
			label.append(genderTagPrefix);
			int gender = ui.getGender().shortValue();
			if(gender == 1){
				label.append("男");
			}else{
				label.append("女");
			}
			label.append(genderTagPostfix);
			
			UserDTO userDTO = new UserDTO(ui.getId(), label.toString(), ui.getNickName());
			resultList.add(userDTO);
		}
		
		return resultList;
	}
}

 SearchServlet.java

 

package com.gary.test.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import net.sf.json.JSONArray;

import com.gary.test.entity.User;
import com.gary.test.util.AutoCompleteUtil;
import com.gary.test.util.UserDTO;

/**
 * 搜索用户
 * @author gary
 *
 */
public class SearchServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	public SearchServlet() {
		super();
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		
		String nickName = request.getParameter("nickName");
		if(!StringUtils.isBlank(nickName)){
			nickName = URLDecoder.decode(nickName, "UTF-8");
		}
		log("nickName:" + nickName); 
		
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		
		//TODO:测试数据仅供演示,需改为从DAO获取查询结果
		List<User> userList = this.getTestData();
		List<UserDTO> list = AutoCompleteUtil.convert(userList); 

		if(list.size() == 0){
			list.add(new UserDTO(0, "无此用户","无此用户"));
		}
		
		//生成JSON数组
		JSONArray json = JSONArray.fromObject(list);
		String jsonStr = json.toString();
		
		log(jsonStr);
		
		out.print(jsonStr);
		out.flush();
		out.close();
	}
	
	/**
	 * 生成测试数据,模拟搜索结果
	 * @return
	 */
	private List<User> getTestData(){
		List<User> list = new ArrayList<User>();
		for (int i = 1; i < 20; i++) {
			User u = new User(i, "测试用户" + i,"123", "gravatar.jpg", (short) (i % 2));
			list.add(u);
		}
		return list;
	}


}