[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; @&2T0UB
} UO!OO&l!
int i1=l; !\"C<*5
int i2=mid+1; !CsoTW9C:
for(int cur=l;cur<=r;cur++){ SJy?^
if(i1==mid+1) &Nec(q<
data[cur]=temp[i2++]; QDgOprha
else if(i2>r) p*dez!
data[cur]=temp[i1++]; 3Um\?fj>}(
else if(temp[i1] data[cur]=temp[i1++]; Q2tGe~H
else V;)'FJ)]
data[cur]=temp[i2++]; AS8T!
} Mr`u!T&sc
} 4y P $l
%*/?k~53
} =e ;\I/
52:oe1-8
改进后的归并排序: ; 4S#6#
;JAe=wt^'I
package org.rut.util.algorithm.support; 3J[P(G>Q
;w@:
import org.rut.util.algorithm.SortUtil; pR~PB
i#Wl?(-i
/** VW'e&v1.
* @author treeroot vKI,|UD&-
* @since 2006-2-2 "+7~C6[s
* @version 1.0 &[kwM395
*/ qkR.{?x
public class ImprovedMergeSort implements SortUtil.Sort { GLk7#Y
[bv.`
private static final int THRESHOLD = 10; OCRx|
3[8'pQ!&
/* <xc"y|7X
* (non-Javadoc) qWP1i7]=/
* a_pkUOu6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s+0$_&xR
*/ 6}|/~n
public void sort(int[] data) { r3iNfY b
int[] temp=new int[data.length]; FiIN\
mergeSort(data,temp,0,data.length-1); !H.&"~w@
} IOfo]p-
) d\Se9!
private void mergeSort(int[] data, int[] temp, int l, int r) { e"2 wXd_}
int i, j, k; JQ.ZAhv
int mid = (l + r) / 2; nYE_WXY3V
if (l == r) 8LiRZ"
return; 43 |zjE
if ((mid - l) >= THRESHOLD) Oj<2_u
mergeSort(data, temp, l, mid); Ujw^j
else \DfvNeF
insertSort(data, l, mid - l + 1); ch< zpo:
if ((r - mid) > THRESHOLD) B4J^ rzK
mergeSort(data, temp, mid + 1, r); VS 8|lgQ
else {kmaMP
insertSort(data, mid + 1, r - mid); )"f>cYF
Q&n|tQ*4
for (i = l; i <= mid; i++) { v 7Pv&|
temp = data; ,Cx5( ~kU
} -/FCd(
for (j = 1; j <= r - mid; j++) { . vYGJ8(P
temp[r - j + 1] = data[j + mid]; 8n2*z
} LkNfcBa_
int a = temp[l]; Mu{mj4Y{
int b = temp[r]; E!ZDqq
for (i = l, j = r, k = l; k <= r; k++) { 2{{M{#}S.
if (a < b) { C~6aX/:
data[k] = temp[i++]; [*50Ng>P`
a = temp; v[HxO?x^
} else { .8wR;^
data[k] = temp[j--]; *d(wOl5[
b = temp[j]; m;[z)-&"
} FJ#V"|}
} _|~2i1Ms,
} LsBDfp5/
drN^-e
/** 8zZR%fZ
* @param data <G6wpf8M
* @param l <Z#u_:5@
* @param i ~;U!?
*/ &_!BMzp4
private void insertSort(int[] data, int start, int len) { >~XX'}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '+-R 7#
} yqCy`TK8
} #7'ww*+
} W+1V&a}E
} S0"OU0`N
ts)0+x
堆排序： e6{/e+/R
VsUEp_I
package org.rut.util.algorithm.support; '!En,*'IS
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import org.rut.util.algorithm.SortUtil; S _#UEf
lt(,/
/** (|bht0
* @author treeroot r;S%BFMJS
* @since 2006-2-2 #JTi]U6`
* @version 1.0 U:8^>_
*/ 6G1Z"9<2*
public class HeapSort implements SortUtil.Sort{ @dcW0WQ\
qf7.Sh
/* (non-Javadoc) C'mmo&Pd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s-k-|4
*/ eW\_9E)cY
public void sort(int[] data) { f'r/Q2{n
MaxHeap h=new MaxHeap(); {feS-.Khv
h.init(data); - FE)
for(int i=0;i h.remove(); x6F\|nb
System.arraycopy(h.queue,1,data,0,data.length); !.p!
} @Z.Ne:*J
iiRK3m
private static class MaxHeap{ Fbk<qQH
y(N-1
void init(int[] data){ 9E (>mN
this.queue=new int[data.length+1]; cL=P((<K?
for(int i=0;i queue[++size]=data; Gt- -7S
fixUp(size); E8IWHh_
} +Cau/sPXL
} tD>m%1'&
q9Fc0(&Vf
private int size=0; ")Bf^DV
}rGDM
private int[] queue; ]`u{^f
FeCQGT
public int get() { K$(U>D|
return queue[1]; WgY\m&
} vqL{~tR
sW=@G'}3
public void remove() { nPv2: x
SortUtil.swap(queue,1,size--); mM}|x~\R
fixDown(1); h8S%Q|-
} b^A&K@[W#,
file://fixdown o AQ92~b
private void fixDown(int k) { 0.+iVOz+Y
int j; s?_b[B d
while ((j = k << 1) <= size) { 6`+DBr
if (j < size %26amp;%26amp; queue[j] j++; #0^QUOp
if (queue[k]>queue[j]) file://不用交换 /$q;-/DnTZ
break; YQ?|Vb U
SortUtil.swap(queue,j,k); ;tKL/eI
k = j; W#??fae
} 3bPVKsY
} JgK?j&!hs:
private void fixUp(int k) { s]B^Sz=
while (k > 1) { {5_*f)$[H
int j = k >> 1; -j<UhW
if (queue[j]>queue[k]) Z{ p;J^:
break; e HOm^.gd
SortUtil.swap(queue,j,k); <{cPa\
k = j; u1<xt1K
} $p9XXZ"*
} A+[wH(
6+LXoR'
} V7^?jy&&
0@xuxm/i
} g%\e80~1(
pp{%\td
SortUtil： I5 2wTl0
4P`\fz
package org.rut.util.algorithm; sRoZvp5
t+h"YiT
import org.rut.util.algorithm.support.BubbleSort; J(l6(+8
import org.rut.util.algorithm.support.HeapSort; +)7NWR\
import org.rut.util.algorithm.support.ImprovedMergeSort; {0QA+[Yd&!
import org.rut.util.algorithm.support.ImprovedQuickSort; Y ,}p
import org.rut.util.algorithm.support.InsertSort; yp :yS
import org.rut.util.algorithm.support.MergeSort; "4r5n8
import org.rut.util.algorithm.support.QuickSort; (@&|
import org.rut.util.algorithm.support.SelectionSort; iP_rEi*-J
import org.rut.util.algorithm.support.ShellSort; VD=$:F]
*w%;$\^
/** 4&&j7$aV
* @author treeroot c9ghR0WM
* @since 2006-2-2 xw?G?(WO
* @version 1.0 t zV"|s=o
*/ |E?%Cj^W
public class SortUtil { neZ_TT/3K
public final static int INSERT = 1; )p!dqlK
public final static int BUBBLE = 2; esLY1c%"/
public final static int SELECTION = 3; #}jf TM
public final static int SHELL = 4; xK_$^c.
public final static int QUICK = 5; :z"Uw*
public final static int IMPROVED_QUICK = 6; E8-p ,e,
public final static int MERGE = 7; "#m*`n
public final static int IMPROVED_MERGE = 8; %/>_o{"hw
public final static int HEAP = 9; ^Xb!dnT.*a
JP@UvDE|
public static void sort(int[] data) { mKn[>M1
sort(data, IMPROVED_QUICK); 0,/[r/=jT
} | _S9U|
private static String[] name={ b,K1EEJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" As>po+T*
}; -eNi;u
*}2o \h6Q
private static Sort[] impl=new Sort[]{ K:9.fTCs*
new InsertSort(), %%DK?{jo`
new BubbleSort(), f<zh-Gq
new SelectionSort(), B!-W765Y
new ShellSort(), "#JoB X@yE
new QuickSort(), wr#+q1v
new ImprovedQuickSort(), :x;D- kZ
new MergeSort(), :Mt/6}
new ImprovedMergeSort(), 1yE~#KpH
new HeapSort() PH=wPft
}; ( NiuAy
oYqC"g&4Z
public static String toString(int algorithm){ "\V:W%23W{
return name[algorithm-1]; `[ne<F?e
} [S9nF
$23R%8j
public static void sort(int[] data, int algorithm) { Y<M}'t
impl[algorithm-1].sort(data); %EVg.k$
} OZv&{_b_
](0A/,#q6
public static interface Sort { S@*@*>s^
public void sort(int[] data); ll5Kd=3
} VLOyUt~O#
f|apk,o_
public static void swap(int[] data, int i, int j) { SD697L9
int temp = data; o@>5[2b4
data = data[j]; CiMN J
data[j] = temp; y\%4Dir
} t71 0sWh{
} :)MZgW