[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; .}3K9.hkr
} z/|tsVK
int i1=l; >C -N0H
int i2=mid+1; kV$VKag*A
for(int cur=l;cur<=r;cur++){ DhT8Kh{
if(i1==mid+1) #<yKG\X?
data[cur]=temp[i2++]; jNW/Biy4u
else if(i2>r) TlJ'pG 4^
data[cur]=temp[i1++]; yOyuMZo6
else if(temp[i1] data[cur]=temp[i1++]; Y|aaZ|+
else |],ocAN{
data[cur]=temp[i2++]; H~?p,h
} eI+p
} #w;%{C[D
fU'[lZ
} B)s%B'
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改进后的归并排序: i 8:^1rHp)
Zmy:Etqi
package org.rut.util.algorithm.support; $rH}2
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import org.rut.util.algorithm.SortUtil; K(Ak+&[
Yn8aTg[J
/** !6eF8T
* @author treeroot U9h@1:
* @since 2006-2-2 Sxcp [g;
* @version 1.0 pGsu#`t
*/ y-o54e$4Cq
public class ImprovedMergeSort implements SortUtil.Sort { k Hh0&~(
^Dys#^
private static final int THRESHOLD = 10; 6<9gVh<=w
yGlOs]>n
/* e%KCcU
* (non-Javadoc) y-)5d
* 5Pd^Sew
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #LfoG?k1K
*/ 3=IY0Q>/(
public void sort(int[] data) { J;Veza
int[] temp=new int[data.length]; W4:#=.m
mergeSort(data,temp,0,data.length-1); !p(N DQm
} Ky)*6QOw
Hq "l`
private void mergeSort(int[] data, int[] temp, int l, int r) { :xsNn55b
int i, j, k; #80M+m
int mid = (l + r) / 2; nfS.0\z
if (l == r) 2E0$R%\
return; Hs(U|BXU
if ((mid - l) >= THRESHOLD) DQ= /Jr~
mergeSort(data, temp, l, mid); Z1oUAzpj4
else ,5P tB]8&3
insertSort(data, l, mid - l + 1); ^(1S`z$
if ((r - mid) > THRESHOLD) 7aeyddpM
mergeSort(data, temp, mid + 1, r); jU=n\o=?
else aaFt=7(K
insertSort(data, mid + 1, r - mid); $Zf]1?|xa
@fI2ZWN|
for (i = l; i <= mid; i++) { QP!0I01
temp = data; E,7b=t
} cGS7s 8U
for (j = 1; j <= r - mid; j++) { "i;"
temp[r - j + 1] = data[j + mid]; SsQg8d
} `h$^=84
int a = temp[l]; l6< bV#_qe
int b = temp[r]; h|[oQ8)
for (i = l, j = r, k = l; k <= r; k++) { `r*bG=
if (a < b) { ] F2{:RW
data[k] = temp[i++]; ]McDN[h:
a = temp; g5~wdhpb
} else { #~6au6LMC
data[k] = temp[j--]; 5U<;6s
b = temp[j]; \mDBOC0eK
} BVv{:m{w
} '"J``=
} RV_+-m{]
i" >kF@]c8
/** =J^FV_1rJ
* @param data v42Z&PO
* @param l L'<.#(|
* @param i d`4F
*/ U t.#h="
private void insertSort(int[] data, int start, int len) { 'Sjt*2blq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zAO|{m<A2
} hbE~.[Y2r
} 3V@!}@y,F6
} w*B4>FYg
} utBKl'`
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堆排序： (zIIC"~5
f"0?_cG{%
package org.rut.util.algorithm.support; OQh4MN#$
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import org.rut.util.algorithm.SortUtil; z9HUI5ns
v?`DP
/** kr>F=|R]
* @author treeroot 31~Rs?~f(
* @since 2006-2-2 &E`=pe/e
* @version 1.0 Qk`LBvg1
*/ 2t`d.s=
public class HeapSort implements SortUtil.Sort{ R![4|FR
>2dF^cDE-3
/* (non-Javadoc) ==Bxv:6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,_RPy2N
*/ :x36Z4:
public void sort(int[] data) { Yo[Pu< zR
MaxHeap h=new MaxHeap(); v}BXH4&Y
h.init(data); &KVXU0F^z
for(int i=0;i h.remove(); L~e{Vv8UR
System.arraycopy(h.queue,1,data,0,data.length); ]$i~;f 8I
} =Bb/Y`Q
XcM.<Dn3
private static class MaxHeap{ ::8c pUc`f
QW_W5|_
void init(int[] data){ Y@Ti2bI`v
this.queue=new int[data.length+1]; B%/N{i*Z
for(int i=0;i queue[++size]=data; @&GfCg5Cb
fixUp(size); 29r(Y
} =JfSg'7
} Vl%jpjqP
(v1~p3H
private int size=0; o1)8?h
(bON[6OGm
private int[] queue; x`VA3nE9
IHvrx:7
public int get() { CyD)=e{
return queue[1]; X!!3>`|
} fm&pxQjg
6;#Rd|
public void remove() { ]c\d][R N
SortUtil.swap(queue,1,size--); % n~ 'UA
fixDown(1); )@a_|q@V
} x0$#8
file://fixdown (?lKedA>2
private void fixDown(int k) { zb& 3{,
int j; c`xgz#]v
while ((j = k << 1) <= size) { dI) 9@UL
if (j < size %26amp;%26amp; queue[j] j++; d0D*S?#8,C
if (queue[k]>queue[j]) file://不用交换 ":V,&o9n
break; \2VYDBi?|
SortUtil.swap(queue,j,k); ysFp`
k = j; (I\qTfN4
} QBL|n+
} iuS*Vw
private void fixUp(int k) { gPw{'7'U
while (k > 1) { klSAY
int j = k >> 1; SRek:S,
if (queue[j]>queue[k]) 10W6wIqK
break; ,8Q&X~$rY
SortUtil.swap(queue,j,k); OGAC[s~V
k = j; B8.uzX'p
} 6uKS!\EY|
} ;cp,d~mrf
XG}9)fT
} =9L1Z \f
wi@Qf6(mn
} 'rDai[
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SortUtil： 2tI,`pSU
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package org.rut.util.algorithm; f&NXWo/
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import org.rut.util.algorithm.support.BubbleSort; 0=Mu|G|Z
import org.rut.util.algorithm.support.HeapSort; _FtsO<p)"
import org.rut.util.algorithm.support.ImprovedMergeSort; QI*<MF,1
import org.rut.util.algorithm.support.ImprovedQuickSort; ,WQg.neOA
import org.rut.util.algorithm.support.InsertSort; v]X*(e
import org.rut.util.algorithm.support.MergeSort; ky=h7#wdv-
import org.rut.util.algorithm.support.QuickSort; xvTz|Y
import org.rut.util.algorithm.support.SelectionSort; h"t\x}8qq
import org.rut.util.algorithm.support.ShellSort; vk.P| Y-;
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/** ,'&H`h54
* @author treeroot JUdQ Q
* @since 2006-2-2 y87oW_"h
* @version 1.0 xj;V
*/ OmLe+,7'
public class SortUtil { 'e:(61_
public final static int INSERT = 1; LZ<^b6Dxk
public final static int BUBBLE = 2; ]oxi~TwY^
public final static int SELECTION = 3; 4rrR;V"}
public final static int SHELL = 4; ]..7t|^b&
public final static int QUICK = 5; 'mO>hD`V
public final static int IMPROVED_QUICK = 6; =SVb k
public final static int MERGE = 7; %3@-.=
public final static int IMPROVED_MERGE = 8; tZan1C%p>
public final static int HEAP = 9; <BjrW]pM
][`%vj9r
public static void sort(int[] data) { E_T!|Q.
sort(data, IMPROVED_QUICK); @^Yr=d ba
} a9y+FCA
private static String[] name={ t$g@+1p4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :s>x~t8g#n
}; C@{-$z)
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private static Sort[] impl=new Sort[]{ y7| 3]>Z
new InsertSort(), VMH^jCFp
new BubbleSort(), lb\VQZp!y
new SelectionSort(), Kjt\A]R%
new ShellSort(), D";@)\jN
new QuickSort(), y-N]{!
new ImprovedQuickSort(), Fx )BMP
new MergeSort(), -Pc6W9$
new ImprovedMergeSort(), aKz:hG
new HeapSort() `T3B
}; #*X\pjZ
Eo>EK>
public static String toString(int algorithm){ v-DZW,
return name[algorithm-1]; b)@rp
} uYC1}Y5N
nYE%@Up
public static void sort(int[] data, int algorithm) { OXI>`$we
impl[algorithm-1].sort(data); :f~qt%%/
} }/2M?W0
(9Q@I8}Iy
public static interface Sort { %"^8$A?>,k
public void sort(int[] data); e%C_>
} $[\\{XJ.
xSq{pxX
public static void swap(int[] data, int i, int j) { Z):Nd9
int temp = data; }CL7h;5N 3
data = data[j]; oS^KC}X
data[j] = temp; |=AaGJx
} ]94`7@
} `IT]ZAem`/