[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; y8z%s/gRh
} 1hij4m$b
int i1=l; ]]3D` F}
int i2=mid+1; w,9F riW
for(int cur=l;cur<=r;cur++){ |Wk G='02
if(i1==mid+1) Q4q#/z
data[cur]=temp[i2++]; Q~_x%KN/`
else if(i2>r) 64fG,b
data[cur]=temp[i1++]; @CF4:NNHw
else if(temp[i1] data[cur]=temp[i1++]; 1PSb72h<
else 'DQyB`V2y
data[cur]=temp[i2++]; (mlc']F
} =YIQ _,{u
} Shz;)0To
P\e%8&_U/
} 9lV'3UG-?
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改进后的归并排序: R0}%
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package org.rut.util.algorithm.support; 9l]IE,u
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import org.rut.util.algorithm.SortUtil; vE(Hy&Q&
^dv>n]?
/** ,RQ-w2j?
* @author treeroot qE{S'XyM,
* @since 2006-2-2 9MxGyGz$
* @version 1.0 to7)gOX(
*/ %>TdTt
public class ImprovedMergeSort implements SortUtil.Sort { $ cSZX#\
aDuanGC/V
private static final int THRESHOLD = 10; 7ow1=%Q
.~J^`/o
/* K<GCP2
* (non-Javadoc) HrGX-6`
* =P{RHhWy;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @HI5;z
*/ cqudF=q
public void sort(int[] data) { ;rgsPVbVf
int[] temp=new int[data.length]; F1>,^qyG6
mergeSort(data,temp,0,data.length-1); x{$NstGB
} 'Iu(lpF&
'oG'`ED"
private void mergeSort(int[] data, int[] temp, int l, int r) { *Y Ox`z!R
int i, j, k; 4a-wGx#h
int mid = (l + r) / 2; v(`$%V.
if (l == r) 1 <+^$QL
return; 0P(}e[~Z
if ((mid - l) >= THRESHOLD) Q*: Ow]
mergeSort(data, temp, l, mid); G<'S
else 7f>n`nq?
insertSort(data, l, mid - l + 1); =%LS9e^7D
if ((r - mid) > THRESHOLD) 16vfIUtb
mergeSort(data, temp, mid + 1, r); zeX?]@]Y
else D#0}/
insertSort(data, mid + 1, r - mid); V EzIWNV
OK=t)6&b
for (i = l; i <= mid; i++) { }qTvUs
temp = data; M3%<kk-_
} A\`Uu&
for (j = 1; j <= r - mid; j++) { I/g]9 y
temp[r - j + 1] = data[j + mid]; ^^#A9AM
} (C&f~U
int a = temp[l]; 2 O%UT?R
int b = temp[r]; h.nzkp5
for (i = l, j = r, k = l; k <= r; k++) { v|6fqG+Q\
if (a < b) { GfDA5v[
data[k] = temp[i++]; sC>8[Jatd
a = temp; C$8=HM3
} else { Yh=Zn[U
data[k] = temp[j--]; v&Kw 3!X#E
b = temp[j]; aC*J=_9o#
} tBrVg<]t
} A Ho<E"R\
} "TPMSx&Ei
=B 9U
/** Wxjpe4
* @param data v!2`hqO
* @param l 5s;#C/ZZ
* @param i y}A-o_u@cD
*/ WVZ\4y
private void insertSort(int[] data, int start, int len) { pS0T>r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]#`bYh^y
} #ed]zI9O
} &PbH!]yd
} 2bqwnRT}
} 3XIxuQwf
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堆排序： XIU2l}g
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package org.rut.util.algorithm.support; q07>FW R
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import org.rut.util.algorithm.SortUtil; \a<E3 <
rie1F,
/** rVLA"x 9u
* @author treeroot tZJKB1#WbP
* @since 2006-2-2 ~34$D],D
* @version 1.0 fI6F};I5}T
*/ '?\Hm'8
public class HeapSort implements SortUtil.Sort{ :M Md@
K|iNEhuc
/* (non-Javadoc) bbz86]AhY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OA+W$
*/ gbvBgOp
public void sort(int[] data) { c8(.bmvF
MaxHeap h=new MaxHeap(); jsuQR
h.init(data); S5j#&i
for(int i=0;i h.remove(); X]N8'Yt
System.arraycopy(h.queue,1,data,0,data.length); D`u{U]
} _b+3;Dy
Gb"PMai
private static class MaxHeap{ BJqM=<nQ
d<y B ~Y
void init(int[] data){ 'SC`->F4D
this.queue=new int[data.length+1]; \!_ >ul
for(int i=0;i queue[++size]=data; 9vXrC_W9
fixUp(size); g%K3ah v
} )pg?ZM9
} 5z0SjQ
co: W!
private int size=0; a}6Wo=
L;Nm"[`
private int[] queue; ZW2U9
kc}e},k
public int get() { $#CkI09
return queue[1]; {&xKSWNc
} 6b@:La
GZse8ng
public void remove() { `Do-!G+W
SortUtil.swap(queue,1,size--); OfPWqNpO
fixDown(1); S^3I"B
} Y#KgaZ7N
file://fixdown j#29L"
private void fixDown(int k) { l/SbJrM*
int j; ^hU7QxW
while ((j = k << 1) <= size) { W}Z'zU?[
if (j < size %26amp;%26amp; queue[j] j++; K?) &8S
if (queue[k]>queue[j]) file://不用交换 QHK$2xtq|
break; YqYCW}$
SortUtil.swap(queue,j,k); }=NjFK_6
k = j; lV3\5AEW
} b*7OIN5h
} 4jvgyi9
private void fixUp(int k) { 0Y{A
while (k > 1) { [^#6.xH
int j = k >> 1; ='a$>JVJ5
if (queue[j]>queue[k]) {@k5e) Q
break; K"eW.$
SortUtil.swap(queue,j,k); ^MuO;<<,.
k = j; EiSS_Lc
} /.P*%'g
} TC'tui
O",:0<
} "+p_{J/P
b3W@{je
} <yBZsSj
MC^H N w
SortUtil： +Ibcc8Qud
+[ !K
package org.rut.util.algorithm; LyH{{+V
=j6f/8
import org.rut.util.algorithm.support.BubbleSort; 9%pq+?u9
import org.rut.util.algorithm.support.HeapSort; tQF,E&Jo8
import org.rut.util.algorithm.support.ImprovedMergeSort; "d9"Md0k
import org.rut.util.algorithm.support.ImprovedQuickSort; Fc{hzqaP8
import org.rut.util.algorithm.support.InsertSort; $0 eyp]XC\
import org.rut.util.algorithm.support.MergeSort; :A>cf}
import org.rut.util.algorithm.support.QuickSort; BZe x
import org.rut.util.algorithm.support.SelectionSort; 4Z,MqG>
import org.rut.util.algorithm.support.ShellSort; V|)3l7IC<
W-2,QVp%
/** Ap=LlZ
* @author treeroot uD_iyK0,
* @since 2006-2-2 `J#(ffo-
* @version 1.0 ^ 14U]<
*/ ;~3CuN8
public class SortUtil { oIN!3
public final static int INSERT = 1; ,dP-sD;<
public final static int BUBBLE = 2; |#>\GU=!
public final static int SELECTION = 3; WL:CBE#
public final static int SHELL = 4; /0IvvD!7N
public final static int QUICK = 5; {%*,KB>b
public final static int IMPROVED_QUICK = 6; 9t9x&.A
public final static int MERGE = 7; L TzD\C'
public final static int IMPROVED_MERGE = 8; LY(YgqL
public final static int HEAP = 9; vvwNJyU-
_SY4Qs`d
public static void sort(int[] data) { -W<x|ph U
sort(data, IMPROVED_QUICK); q,(U8
} j#rjYiYKy
private static String[] name={ },lHa!<^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cia'h_w
}; Wxx?iW ,
/_rEI,[k
private static Sort[] impl=new Sort[]{ ~bC{R&p
new InsertSort(), J'jwRn
new BubbleSort(), e0Zwhz,
new SelectionSort(), G(" S6u
new ShellSort(), ;EDc1:
new QuickSort(), `83s97Sa
new ImprovedQuickSort(), fMgB!y"Em
new MergeSort(), m^I+>Bp/:
new ImprovedMergeSort(), ssj(-\5
new HeapSort() aNs~Uad1U
}; *:L-/Q)i
+uZ,}J
public static String toString(int algorithm){ {}RE;5n\['
return name[algorithm-1]; ra2sYH1wr
} 9$U@h7|Q`
%&w 8E[
public static void sort(int[] data, int algorithm) { Z<jio
impl[algorithm-1].sort(data); M$iDaEu-
} B)>r~v]
8`~M$5!
public static interface Sort { vkUXMMuf+e
public void sort(int[] data); 1$mxMXNsJ
} )lh48Ag0t;
q% *-4GP
public static void swap(int[] data, int i, int j) { #e)A
int temp = data; nE;^xMOK!
data = data[j]; `<_A#@
data[j] = temp; HmlE Cx
} |[qq $
} #y;TSHx/