[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; -ti{6:H8
} =\{\g7
int i1=l; Y\=FLO9
int i2=mid+1; 6yy;JQAke
for(int cur=l;cur<=r;cur++){ }17.~
if(i1==mid+1) &Z^l=YH,
data[cur]=temp[i2++]; tV/Z)fpyH
else if(i2>r) IooNb:(
data[cur]=temp[i1++]; n& $^04+i
else if(temp[i1] data[cur]=temp[i1++]; !JBae2Z
else {5|("0[F
data[cur]=temp[i2++]; |([R'Orm
} /1`cRyS
} }!TL2er_
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} z5]bia,
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改进后的归并排序: =?X$Yaw*
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package org.rut.util.algorithm.support; 90xk$3(
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import org.rut.util.algorithm.SortUtil; lHB) b}7E
[ REf>_R
/** >ulY7~wUv
* @author treeroot \b*X:3g*
* @since 2006-2-2 ^S#t|rN
* @version 1.0 G9g6.8*&
*/ oK9'
public class ImprovedMergeSort implements SortUtil.Sort { Yct5V,X^
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private static final int THRESHOLD = 10; MEiRj]t
|3? 8)z\n
/* B%\gkl
* (non-Javadoc) 5HS~op2n/
* q*)+K9LRk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rbqo"g`
*/ ,LOQDIyn
public void sort(int[] data) { N]YtLa,t
int[] temp=new int[data.length]; Jg$xO@.
mergeSort(data,temp,0,data.length-1); Ei({`^
} 23DJV);g8
s0hBbL0DH
private void mergeSort(int[] data, int[] temp, int l, int r) { #hw/^AaD-
int i, j, k; b.2J]6G
int mid = (l + r) / 2; 3_5XHOdE
if (l == r) W0cgI9=9
return; %}>dqUyQ
if ((mid - l) >= THRESHOLD) /Y^8SO4
mergeSort(data, temp, l, mid); |vFj*XU
else `3q;~ 9
insertSort(data, l, mid - l + 1); "'Z- UV
if ((r - mid) > THRESHOLD) [*m2
mergeSort(data, temp, mid + 1, r); 4QJ8Z t
else y0ckm6^
insertSort(data, mid + 1, r - mid); P|jF6?C
=GR'V
for (i = l; i <= mid; i++) { Dmdy=&G
temp = data; 8n?kZY$,
} 9j|gdfb%ml
for (j = 1; j <= r - mid; j++) { %zo= K}u
temp[r - j + 1] = data[j + mid]; l+y-Fo@
} 34|a:5c
int a = temp[l]; H]#Rg`~n
int b = temp[r]; l)+:4N?iVv
for (i = l, j = r, k = l; k <= r; k++) { .>6 Wv0
if (a < b) { Z$KV&.=+
data[k] = temp[i++]; @\Js8[wS9@
a = temp; +K6szGP
} else { <Mf*l)%*
data[k] = temp[j--]; '7Ig.K&
b = temp[j]; ,7d|O}B
} o`r(`6@
} YTyX`Y#
} +iF 1sC_
#^mqQRpgq
/** ]y1fM0
* @param data tjv\)Nn'
* @param l Q*O<@
* @param i v@u<Ww;=@
*/ O%1/r*
private void insertSort(int[] data, int start, int len) { q'(z #h,cv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {)K](S ~
} FEm=w2
} nwM)K
} h ; kfh.
} )%JD8;[Jq
Yr&Ka:
堆排序： &:#m&,tQ
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package org.rut.util.algorithm.support; =ak7ldA=2
9XV^z*E(J
import org.rut.util.algorithm.SortUtil; IjZ@U%g@;
NW.XA! =E)
/** CB*/ =Y
* @author treeroot hG Apuy
* @since 2006-2-2 Dl;d33
* @version 1.0 KAb(NZK
*/ ,{<p
public class HeapSort implements SortUtil.Sort{ d\]O'U)s
OV5e#AOy)
/* (non-Javadoc) ESDB[ O+`x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :):zNn_>`
*/ %<}=xJf>1
public void sort(int[] data) { qa!RH]B3
MaxHeap h=new MaxHeap(); HcJE0-"
h.init(data); l C\E
for(int i=0;i h.remove(); wq72%e
System.arraycopy(h.queue,1,data,0,data.length); e.X@] PQJQ
} n,KA&)/s
aR:<<IF\
private static class MaxHeap{ Fh`-(,e?5
W(@>?$&
void init(int[] data){ k:P$LzIB
this.queue=new int[data.length+1]; |< N frz
for(int i=0;i queue[++size]=data; NfF~dK|
fixUp(size); koH4~m{
} %D^bahf
} &`@M8-m#F
|%ZpatZA5
private int size=0; fS./y=j(X
6GKT yN
private int[] queue; JE)J<9gf
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public int get() { `-D$Fsl
return queue[1]; EUwQIA2c8N
} r'd/qnd
}[,3yfiX
public void remove() { ~n]NyVFP
SortUtil.swap(queue,1,size--); ?'2 v.5TQt
fixDown(1); c$#GM57V
} .3g&9WvN!Z
file://fixdown 2X_>vIlEm
private void fixDown(int k) { qeMv Vf
int j; T}2:.Hk:N
while ((j = k << 1) <= size) { pF='jj51
if (j < size %26amp;%26amp; queue[j] j++; 'rx?hL3VW
if (queue[k]>queue[j]) file://不用交换 ;](h2Z`3s
break; .&(8(C
SortUtil.swap(queue,j,k); 4e/cqN6
k = j; sV'v* 1|
} |#cAsf_{
} 9cOx@c+/
private void fixUp(int k) { E$T(Qu<-
while (k > 1) { 0pNo`Bm
int j = k >> 1; #HDesen
if (queue[j]>queue[k]) !Mil?^
break; _m7co :
SortUtil.swap(queue,j,k); )KE_t^$
k = j; M c@GH
} )l{A{f6O
} YOKR//|3
N ^f}ui i
} > Z++^YVE
.Qk{5=l6P
} `]hCUaV
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SortUtil： h60\ Y 8
-eq=4N=s
package org.rut.util.algorithm; uWrFunh%
}s6G!v^2""
import org.rut.util.algorithm.support.BubbleSort; ;/aB)JZ5=
import org.rut.util.algorithm.support.HeapSort; CK Mv7
import org.rut.util.algorithm.support.ImprovedMergeSort; Z^+a*^w~{
import org.rut.util.algorithm.support.ImprovedQuickSort; D1! {S7
import org.rut.util.algorithm.support.InsertSort; 1t%<5O;R
import org.rut.util.algorithm.support.MergeSort; wQw-:f-
import org.rut.util.algorithm.support.QuickSort; q]+)c2M
import org.rut.util.algorithm.support.SelectionSort; =g[H]-Ee
import org.rut.util.algorithm.support.ShellSort; um}N%5GAa
_r7=&oL.Q
/** ^#7viZ*
* @author treeroot fOJj(0=y
* @since 2006-2-2 xcnt?%%M
* @version 1.0 'ucGt
*/ h=Oh9zsz8
public class SortUtil { X{s/``n
public final static int INSERT = 1; (L:`ojiU
public final static int BUBBLE = 2; 'XEK&Yi1
public final static int SELECTION = 3; F_ _H(}d
public final static int SHELL = 4; mf~Lzp
public final static int QUICK = 5; X,&xhSzg?
public final static int IMPROVED_QUICK = 6; {\luieG
public final static int MERGE = 7; {NY]L==H
public final static int IMPROVED_MERGE = 8; N[]U%9[=2F
public final static int HEAP = 9; ny~W]1
w. vY(s
public static void sort(int[] data) { ,0FwBK
sort(data, IMPROVED_QUICK); =E; #OZO
} CHg]Ul
private static String[] name={ Z3Gm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SCI1bMf
}; &EGY+p|2Y
n)Hk8)^8
private static Sort[] impl=new Sort[]{ RAdvIIQp:
new InsertSort(), T[m ~6
new BubbleSort(), .oEFX8
new SelectionSort(), EuLXtq
new ShellSort(), A mvw`u>
new QuickSort(), 0|GpZuGO9
new ImprovedQuickSort(), a2[8wv1
new MergeSort(), $xQ"PJ2
new ImprovedMergeSort(), yX3PUO9
new HeapSort() phe"JNML
}; IF& PGo
G1p43
public static String toString(int algorithm){ v'K % %z
return name[algorithm-1]; _>;&-e
} z?I+u*rF6
Mo~ki"9.
public static void sort(int[] data, int algorithm) { /XjN%|
impl[algorithm-1].sort(data); vB=;_=^i1
} Bmmb
|z]aa
public static interface Sort { |}%(6<
public void sort(int[] data); v?FhG b~1
} Euqjxz
`~0P[>|+
public static void swap(int[] data, int i, int j) { z( *]'Y
int temp = data; l#p}{
data = data[j]; KQ-,W8Q5
data[j] = temp; a (P^e)<
} P_v0))n{
} }FHw" {my