[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; &*~ WK
} "zc!QHpSd
int i1=l; Rwk|cqr
int i2=mid+1; v-qS 'N4
for(int cur=l;cur<=r;cur++){ 7ac3N
if(i1==mid+1) /8R1$7
data[cur]=temp[i2++]; 9G9lSj5>
else if(i2>r) '@bA_F(
data[cur]=temp[i1++]; zvWQ&?&o2
else if(temp[i1] data[cur]=temp[i1++]; 38^_(N
else SQK6BEjE8
data[cur]=temp[i2++]; [g_@<?zg
} ]2'~e,"O
} TB\CSXb
hJ :+*46
} m? hX=
ap!<8N
改进后的归并排序: 5+J/Qm8{bb
A`Nb"N$H13
package org.rut.util.algorithm.support; IA'AA|v
up?8Pq*
import org.rut.util.algorithm.SortUtil; 'M{_S
wVTo7o%U
/** 7Ll(,i<,C
* @author treeroot ?a}~yz#B(
* @since 2006-2-2 :OM>z4mQ
* @version 1.0 \I=:,cz*,
*/ +tF,E^
public class ImprovedMergeSort implements SortUtil.Sort { .^,vK7
_{aVm&^kA
private static final int THRESHOLD = 10; M 5h U.3.L
}sZ]SE
/* /k,p]/e
* (non-Javadoc) l=yO]a\QZ
* ADDpm-]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) as8<c4:v
*/ mB\|<2
public void sort(int[] data) { U?>cm`DBP
int[] temp=new int[data.length]; qeYr=%)c
mergeSort(data,temp,0,data.length-1); *`W82V
} ZmDr$iU~
&nYmVwi?"Q
private void mergeSort(int[] data, int[] temp, int l, int r) { LO229`ARr|
int i, j, k; n3w2&
int mid = (l + r) / 2; ;L7<mU
if (l == r) D~Su822
return; |(fWT}tg
if ((mid - l) >= THRESHOLD) >=bO@)[
mergeSort(data, temp, l, mid); li[g =A,
else d=pq+
insertSort(data, l, mid - l + 1); sC j3h
if ((r - mid) > THRESHOLD) T&%>/7I>
mergeSort(data, temp, mid + 1, r); -T>`PJpJuL
else Z.<B>MD8^
insertSort(data, mid + 1, r - mid); MX34qJ9k
H>B:jJf
for (i = l; i <= mid; i++) { sXUM,h8$!+
temp = data; f &H`h
} G7yxCU(I\
for (j = 1; j <= r - mid; j++) { Yr!3mU-Uvt
temp[r - j + 1] = data[j + mid]; >9DgsA`'
} AjpQb~\
int a = temp[l]; 1g@kHq
int b = temp[r]; lUrchLoDt
for (i = l, j = r, k = l; k <= r; k++) { rRMC<.=
if (a < b) { vDemY"wz
data[k] = temp[i++]; YG%Zw
a = temp; 0y(d|;':
} else { O/-xkzR*
data[k] = temp[j--]; Y#G '[N>
b = temp[j]; Vj_ $%0
} ,70|I{,Km
} .R1)i-^
} uZNR]+Yu@
5VI'hxU4Qg
/** +VJl#sc/;
* @param data k3Y>QN|q8
* @param l -Fb/GZt|
* @param i y ^YrGz.
*/ S7V;sR"V2
private void insertSort(int[] data, int start, int len) { tY7u\Y;^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %n( s;/_
} jE{z4en
} q>Y_I<;'g
} ve$P=ZuM
} OS3J,f}<=
OIN]u{S
堆排序： (GZm+?
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package org.rut.util.algorithm.support; 7>.^GD
+}^
import org.rut.util.algorithm.SortUtil; TGg*(6'z
=U:iR
/** #xO`k1W.
* @author treeroot 1{A4_/R
* @since 2006-2-2 X:DHz0S
* @version 1.0 HLS^Ga,(
*/ I(2ID +
public class HeapSort implements SortUtil.Sort{ j*P@]&e7d
sh0O~%]g
/* (non-Javadoc) 1vobfZ-w9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y}0-&
*/ /%.K`BMN
public void sort(int[] data) { Y.-i;Mmu
MaxHeap h=new MaxHeap(); NY_Oo!)3
h.init(data); {r Gx*<e
for(int i=0;i h.remove(); xH92=t-w
System.arraycopy(h.queue,1,data,0,data.length); @x)z" )>
} :`_wy-}V
<)M?qkjb
private static class MaxHeap{ '0[l'Dt'
7n#0eska,
void init(int[] data){ tJ 6:$dh
this.queue=new int[data.length+1]; fd(>[RP?
for(int i=0;i queue[++size]=data; *?c~7ru
fixUp(size); IqmavnM#
} {|a' =I#2
} h.DQ6!?;s
ieObo foD
private int size=0; )xi|BqQz
BV<LIrAS
private int[] queue; B64%| S
Y*4\K%e(
public int get() { ~ejHA~QC
return queue[1]; Bs^W0K$uBO
} nHA2p`T
:qI myaGQ
public void remove() { 9!o:)99U
SortUtil.swap(queue,1,size--); iK)w3S}k1y
fixDown(1); )]v vp{
} i^ 1P6B
file://fixdown 8R)*8bb
private void fixDown(int k) { :kgwKuhL
int j; |gT$M_}
while ((j = k << 1) <= size) { D|OX]3~
if (j < size %26amp;%26amp; queue[j] j++; J)*y1
if (queue[k]>queue[j]) file://不用交换 4H{L>e
break; i<-#yL5
SortUtil.swap(queue,j,k); @T1-0!TM')
k = j; MYLq2g\
} u'}DG#@-
} Ff|?<\x0}A
private void fixUp(int k) { iHTxD1D+H
while (k > 1) { eqXW|,zUm
int j = k >> 1; a "8/y4Y
if (queue[j]>queue[k]) W/fM0=!
break; GAQVeL1
SortUtil.swap(queue,j,k); t:W`=^
k = j; ([s2F%S`@
} |rsu+0Mtz
} ='>k|s:
+i{&"o4}
} O(CUwk
VYvHpsI
} *S*;rLH9c
%]d^B|
SortUtil： 8DyE
0YW<>Y`6
package org.rut.util.algorithm; .{~ygHQ`f
/SSl$
import org.rut.util.algorithm.support.BubbleSort; 7(ZI]<
import org.rut.util.algorithm.support.HeapSort; N9_9{M{
import org.rut.util.algorithm.support.ImprovedMergeSort; ]l`?"X|^
import org.rut.util.algorithm.support.ImprovedQuickSort; /Eu[7
import org.rut.util.algorithm.support.InsertSort; `}s)0 /}6
import org.rut.util.algorithm.support.MergeSort; u6|P)8?`
import org.rut.util.algorithm.support.QuickSort; mR?OSeeB
import org.rut.util.algorithm.support.SelectionSort; R$wo{{KX
import org.rut.util.algorithm.support.ShellSort; s!uewS.
Au@U;a4UU
/** !%sj-RMvG
* @author treeroot X`[or:cB
* @since 2006-2-2 k'EP->r
* @version 1.0 Z-Zox-I1}-
*/ ,253'53W)
public class SortUtil { 9qW^@5 m
public final static int INSERT = 1; ^\J/l\n
public final static int BUBBLE = 2; E2 #XXc
public final static int SELECTION = 3; XP~4jOL]
public final static int SHELL = 4; s:,BcVLx^
public final static int QUICK = 5; Y[@$1{YS
public final static int IMPROVED_QUICK = 6; m8#+w0p)
public final static int MERGE = 7; nQb{/ TqC'
public final static int IMPROVED_MERGE = 8; p e |k}{
public final static int HEAP = 9; rWAJL9M
,"5Fw4G6*
public static void sort(int[] data) { O~Pbu[C
sort(data, IMPROVED_QUICK); ?tg(X[h{S
} 7l%O:M(\
private static String[] name={ Qgf\gTF$r+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K%Jy?7 U
}; L-",.U*;
D'c,z[
private static Sort[] impl=new Sort[]{ szGp<xv_p
new InsertSort(), Tgc)'8A;BN
new BubbleSort(), cT-XF
new SelectionSort(), c2-NXSjsW
new ShellSort(), gVEW*8
new QuickSort(), Gd%KBb
new ImprovedQuickSort(), 9!}&&]Q`
new MergeSort(), 0Evq</
new ImprovedMergeSort(), fMP$o3;
new HeapSort() ="JLUq*]s
}; !*'uPw:l2
Sc`W'q^X
public static String toString(int algorithm){ Si.3Je[q
return name[algorithm-1]; &FW|O(]
} *C}vy`X
1-Sc@WXd
public static void sort(int[] data, int algorithm) { q!t_qX7u
impl[algorithm-1].sort(data); XSkx<"U*
} t,)`Zu$
,=.&
public static interface Sort { R*VJe+5w
public void sort(int[] data); E0o=
} z%<Z#5_N
&J,MJ{w6"
public static void swap(int[] data, int i, int j) { 2<y!3OeN
int temp = data; ]KBzuz%
data = data[j]; gR )xw)!
data[j] = temp; ~kj1L@gy
} W4Tuc:X5
} ]SA]{id+