[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; u%=bHg
} J&63Z
int i1=l; gp$EXJ=
int i2=mid+1; MOP]\ypn
for(int cur=l;cur<=r;cur++){ C!7U<rI
if(i1==mid+1) X:G&5
data[cur]=temp[i2++]; V;iL[
else if(i2>r) Iys6R?~
data[cur]=temp[i1++]; 8Wdkztp/S
else if(temp[i1] data[cur]=temp[i1++]; O1?B{F/ e
else [|a( y6Q
data[cur]=temp[i2++]; 5ys#L&q'Z
} ;'=VrE6
} /B,B4JI)/
BgJkrv7~
} {A]k%74-a
uX[O,l^}
改进后的归并排序: c8#T:HM|`
b A)b`1lI
package org.rut.util.algorithm.support; W[R]^2QAG
hz<|W5
import org.rut.util.algorithm.SortUtil; Lzh9DYU6
M4TrnZ1D}
/** ,^.S0;D,Z
* @author treeroot ra]!4Kd'
* @since 2006-2-2 $Q8P@L)[
* @version 1.0 E x_L!9>!
*/ *-9#/Cp
public class ImprovedMergeSort implements SortUtil.Sort { CxJfrI_W
PSW#^o
private static final int THRESHOLD = 10; KU+( YF$1
<9@&oN+T
/* LIr(mB"Y0
* (non-Javadoc) X,>(Y8
* 'Z\{D*=V8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GS}0;x
*/ =MMCf0
public void sort(int[] data) { ]KsGkAG
int[] temp=new int[data.length]; M} O[`Fx{W
mergeSort(data,temp,0,data.length-1); ,q8(]n4
} NtHbwU,
rwoF}}
private void mergeSort(int[] data, int[] temp, int l, int r) { rW[SU:
int i, j, k; ]a)IMIh;
int mid = (l + r) / 2; w]n4KR4
if (l == r) wjuGq.qIu
return; 5QR}IxQ
if ((mid - l) >= THRESHOLD) =]T|h
mergeSort(data, temp, l, mid); gyC^K3}
else 3KtAK9PT
insertSort(data, l, mid - l + 1); NzAQ@E2d:
if ((r - mid) > THRESHOLD) Dft4isyt^
mergeSort(data, temp, mid + 1, r); P2>:p%Z
else # 2d,U\_
insertSort(data, mid + 1, r - mid); )eECOfmnZ
Bgf=\7;5
for (i = l; i <= mid; i++) { 0"TgLd
temp = data; $;y1Qiel
} 9-b 8`|s
for (j = 1; j <= r - mid; j++) { Ex6o=D2
temp[r - j + 1] = data[j + mid]; &1=g A.ZR
} N50fL
int a = temp[l]; (e(Rr4
int b = temp[r]; {ZG:M}ieN
for (i = l, j = r, k = l; k <= r; k++) { +1x)z~q=
if (a < b) { E&'#=K[
data[k] = temp[i++]; 1ADv?+j)A/
a = temp; goB;EWz
} else { k9l^6#<?
data[k] = temp[j--]; :v_w!+,/
b = temp[j]; U3/8A:$y
} 0:. 6rp
} _@~PL>g"p
} %0lf
g*F~8+]Y
/** :Z[(A"dA
* @param data bTiBmS
* @param l iyc$)"w
* @param i ac|/Y$\w
*/ e]+7DE
private void insertSort(int[] data, int start, int len) { !x8kB Di,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J]dW1boT@
} TywK\hH
} }YRO'Q{
} =D5wqCT(Q
} {U^j&E
pu#[pa
堆排序： 7C?E z%a@
RbKwO} z$q
package org.rut.util.algorithm.support; L@?e:*h
jC4O`
import org.rut.util.algorithm.SortUtil; B>,A(X&
*t]v}ZV*
/** _CL{IY
* @author treeroot >;7a1+`3
* @since 2006-2-2 WU7cF81$
* @version 1.0 SwX@I6huM
*/ (Igu:=
public class HeapSort implements SortUtil.Sort{ i&*<lff
+<{m45
/* (non-Javadoc) 5e8xKL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'B,KFA<
*/ LZa% x
public void sort(int[] data) { #"<?_fao~
MaxHeap h=new MaxHeap(); '-.wFB;
h.init(data); 7gr^z)${J
for(int i=0;i h.remove(); =|"=l1
System.arraycopy(h.queue,1,data,0,data.length); 2LC w*eT{)
} F 3s?&T)[G
.:N:pWe
private static class MaxHeap{ #Z0-8<\
bS%C?8
void init(int[] data){ fbV@=(y?
this.queue=new int[data.length+1]; QXY}STs
for(int i=0;i queue[++size]=data; YXRjx.srf
fixUp(size); >jKjh!`)!e
} "koo` J
} |T y=7d,
\%4|t,en
private int size=0; He<;4?:
Yt*vqm[WV
private int[] queue; 6KO(j/Gwp
OpUA{P
public int get() { [T]Bfo
return queue[1]; $+jy/:]D
} bw5T2wYZ
&F`L}#oL&
public void remove() { EBwK 7c
SortUtil.swap(queue,1,size--); zR/IqW.`9
fixDown(1); uY]T:UVk
} D )gD<
file://fixdown 3HKxYvc C
private void fixDown(int k) { .)t(:)*b
int j; U{HML|
while ((j = k << 1) <= size) { cd&B?\I
if (j < size %26amp;%26amp; queue[j] j++; u#3)p
if (queue[k]>queue[j]) file://不用交换 AIv<f9*.:
break; Gk 6fO
SortUtil.swap(queue,j,k); i*68-n
k = j; oLw|uU-|
} Man^<T%F
} 0ERsMnU'
private void fixUp(int k) { }H2#H7!H
while (k > 1) { wHWma)}-z
int j = k >> 1; tvT4S
if (queue[j]>queue[k]) .:[`j3s)Y
break; Bj8<@~bX:L
SortUtil.swap(queue,j,k); "/!'9na{QL
k = j; 3C#RjA-2[
} k:mlt:
} -$9~xX
}7Jp :.qk
} BCBUb
w?S8@|MK
} 1@@y]s_.a
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SortUtil： B>@D,)/bT5
8m|x#*5fQl
package org.rut.util.algorithm; P8IRH#ED
K.%z;(U
import org.rut.util.algorithm.support.BubbleSort; 0$l&i=L
import org.rut.util.algorithm.support.HeapSort; $bFgsy*N2
import org.rut.util.algorithm.support.ImprovedMergeSort; hg4J2m
import org.rut.util.algorithm.support.ImprovedQuickSort; 0R*}QXph
import org.rut.util.algorithm.support.InsertSort; L\YZT| K(
import org.rut.util.algorithm.support.MergeSort; G>JxIrN0
import org.rut.util.algorithm.support.QuickSort; m|mG;8}pI
import org.rut.util.algorithm.support.SelectionSort; umryA{Ps
import org.rut.util.algorithm.support.ShellSort; \QiqcD9Y
<\p&jk?
/** X~%IM1+L;
* @author treeroot {o {#]fbO%
* @since 2006-2-2 v=>3"!*
* @version 1.0 leR"j
*/ PYaOH_X.
public class SortUtil { B]i+,u
public final static int INSERT = 1; =@%MV(
public final static int BUBBLE = 2; Fos1WH?\
public final static int SELECTION = 3; Nl=+.d6Qo
public final static int SHELL = 4; 4 #G3ew
public final static int QUICK = 5; ;=#qHo9k1%
public final static int IMPROVED_QUICK = 6; dbd"pR8v
public final static int MERGE = 7; hl}dgp((
public final static int IMPROVED_MERGE = 8; =O;eY?
public final static int HEAP = 9; Sw[=S '(l
iKY-;YK
public static void sort(int[] data) { Y[T J;O!R
sort(data, IMPROVED_QUICK); C>M6&=
} uz8nRS s
private static String[] name={ c'SM>7L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L-SdQTx_
}; %N!h38N2
7~:>WMv9
private static Sort[] impl=new Sort[]{ 2zwuvgiZ
new InsertSort(), Af$0 o=".
new BubbleSort(), v!iWzN
new SelectionSort(), {3jm%ex
new ShellSort(), *pmoLiuB>
new QuickSort(), x[zKtX
new ImprovedQuickSort(), MI?]8+l
new MergeSort(), `;R|V
new ImprovedMergeSort(), F@oT7NB/n
new HeapSort() f45x%tha%
}; 1V#B]x:
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public static String toString(int algorithm){ "~B~{ _<j
return name[algorithm-1]; @?(nwj~ s`
} r@\,VD6J
'cWlY3%t
public static void sort(int[] data, int algorithm) { A632 :V
impl[algorithm-1].sort(data); f'8B[&@L
} aU,0gvI(}
HE8'N=0
public static interface Sort { H!Fr("6}
public void sort(int[] data); 2X qPZ]2g
} ufHuI*
;F" kD
public static void swap(int[] data, int i, int j) { ";%e~ =
int temp = data; o;HdW
data = data[j]; 77Q4gw~2U
data[j] = temp; T<w*dX7F0K
} gwZ+GA
} i'[n`|c<