[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; )ZW[$:wA
} A_\`Gj!s%
int i1=l; ;e"dxAUe!^
int i2=mid+1; h6Q~Di
for(int cur=l;cur<=r;cur++){ 0clq}
if(i1==mid+1) Ei7Oi!1
data[cur]=temp[i2++]; uq2C|=M-x\
else if(i2>r) oj(st{,
data[cur]=temp[i1++]; :O'QL,
else if(temp[i1] data[cur]=temp[i1++]; (e_z*o)\T
else B1V+CP3t
data[cur]=temp[i2++]; ^@C/2RX!
} #`ZBA>FLaQ
} i5,yrPF
G=F_{z\}
} r;9 V7C
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改进后的归并排序: bt};Pn{3
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package org.rut.util.algorithm.support; ?Dl;DE1
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import org.rut.util.algorithm.SortUtil; /iEQ}
iR!]&Oh
/** PfsUe,*
* @author treeroot =axuLP))
* @since 2006-2-2 y=aWSb2y'
* @version 1.0 >"+ho
*/ `TYC]9
public class ImprovedMergeSort implements SortUtil.Sort { kTcW=AXu
l;rA}?,.^
private static final int THRESHOLD = 10; 73_=CP"t
[C/{ru&E
/* cMrO@=b;
* (non-Javadoc) NM9,AG
* Na4O( d`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3B='f"G
*/ =CW> ;h]
public void sort(int[] data) { ZWni5uF-c
int[] temp=new int[data.length]; |2=@8_am
mergeSort(data,temp,0,data.length-1); J(K/z,4h
} 73B[|J*
A.mFa1lH
private void mergeSort(int[] data, int[] temp, int l, int r) { BNF*1JO
int i, j, k; }.pqV X{d
int mid = (l + r) / 2; m[%':^vSr
if (l == r) lQiw8qD
return; xkRS?Q g
if ((mid - l) >= THRESHOLD) KLW>O_+
mergeSort(data, temp, l, mid); "iGQ1#6|d
else X-X`Z`o
insertSort(data, l, mid - l + 1); 3AglvGK7{
if ((r - mid) > THRESHOLD) lXF7)H&T
mergeSort(data, temp, mid + 1, r); =)G]\W)m
else cIQbu#[@
insertSort(data, mid + 1, r - mid); f_$hK9I
i=*H|)
for (i = l; i <= mid; i++) { 4Y}Nu
temp = data; Zoc4@% n
} YXZP-=fB>i
for (j = 1; j <= r - mid; j++) { zy%0;%
temp[r - j + 1] = data[j + mid]; cWG%>.`5r
} sVBr6 !v=
int a = temp[l]; xMNQT.A
int b = temp[r]; d=meh4Y
for (i = l, j = r, k = l; k <= r; k++) { by0K:*C
if (a < b) { Wz#Cyjo
data[k] = temp[i++]; M 87CP=yc
a = temp; P 4t@BwU$
} else { @"BhKUoV$K
data[k] = temp[j--]; 4`)r1D!U
b = temp[j]; fI`gF^u(
} Ww60-d}}Q
} iNfAn&
} i-w$-2w
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/** W7'<Jom|?
* @param data .)$MZyo
* @param l (&Jo. <
* @param i TE$6=;
*/ Z1I.f"XY
private void insertSort(int[] data, int start, int len) { Su7N?X!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _tX=xAO9
} 4ryG_p52l
} q4Wr$T$gs=
} %cg| KB"l
} P`{$7ST'Hh
7I'C'.6iM
堆排序： ZLxa|R7
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package org.rut.util.algorithm.support; Z#Kf%x.
lya},_WCq
import org.rut.util.algorithm.SortUtil; RqGX(Iuv
=?0v,;F9|
/** k9OGnCW\
* @author treeroot wEM=Tr/h
* @since 2006-2-2 f$\O:E=
* @version 1.0 !hZ: \&V
*/ c'tQA
public class HeapSort implements SortUtil.Sort{ z2t+1In,
7`;f<QNo
/* (non-Javadoc) Pb>/b\&JS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |@'O3KA
*/ eGq7+
public void sort(int[] data) { I/tMFg
MaxHeap h=new MaxHeap(); 7~QI4'e
h.init(data); C 5gdvJN
for(int i=0;i h.remove(); (1[59<cg]
System.arraycopy(h.queue,1,data,0,data.length); jhf3(hx&F
} GW;%~qH[,
pg4pfi^__V
private static class MaxHeap{ \H:T)EVy
RYEZ'<
void init(int[] data){ B8T$<
this.queue=new int[data.length+1]; F""9O6u
for(int i=0;i queue[++size]=data; CUI+@|]%
fixUp(size); Dho6N]86r
} ) yMrET m
} 4\&Y;upy+
B F<u3p??
private int size=0; zq{UkoME
jW`JThoq
private int[] queue; !Yb !Au[
)xyjQ|b
public int get() { r)'vn[A
return queue[1]; rnj$u-8
} -C q;
\6SjJ]o>
public void remove() { 0,t%us/q
SortUtil.swap(queue,1,size--); '1ySBl1>
fixDown(1); X n!mdR
} 50N4J
file://fixdown tn'Jkwp
private void fixDown(int k) { 4kM/`g6?,q
int j; 43AzNXWF8
while ((j = k << 1) <= size) { P+hcj p*
if (j < size %26amp;%26amp; queue[j] j++; KN|<yF
if (queue[k]>queue[j]) file://不用交换 1}DA| !~
break; [UzD3VPg
SortUtil.swap(queue,j,k); zg<-%r'$
k = j; fx_#3=bXi
} l}z<q
} J/4T=:\
private void fixUp(int k) { 1^WGJ"1
while (k > 1) { v<!S_7h
int j = k >> 1; Kk8}m;
if (queue[j]>queue[k]) mgjJNzclL
break; _ Ncbo#G
SortUtil.swap(queue,j,k); Ocx"s\q(
k = j; sg $db62>
} ;9T}h2^`B
} 2@zduL'do_
j HHWq>=d
} OT])t<TF6
XA2Ld
} /e'3\,2_
'V:Q :
SortUtil： sW]^YT>?
b0$)G-E/Y
package org.rut.util.algorithm; P9cx&Hk9
,@ 8+%KqG
import org.rut.util.algorithm.support.BubbleSort; o{s2T)2
import org.rut.util.algorithm.support.HeapSort; YJ _eE
import org.rut.util.algorithm.support.ImprovedMergeSort; tUv>1) [
import org.rut.util.algorithm.support.ImprovedQuickSort; hC:'L9Y
import org.rut.util.algorithm.support.InsertSort; fc9;ZX7
import org.rut.util.algorithm.support.MergeSort; EMmgX*iu@
import org.rut.util.algorithm.support.QuickSort; "<ZV'z
import org.rut.util.algorithm.support.SelectionSort; AFz:%m
import org.rut.util.algorithm.support.ShellSort; ]<f)Rf">:`
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/** h:%,>I%{
* @author treeroot b' o]Y
* @since 2006-2-2 J6Z[c*W
* @version 1.0 XNYA\%:5S
*/ n$/|r
public class SortUtil { c?A$Y?|9
public final static int INSERT = 1; x>#{C,Fi
public final static int BUBBLE = 2; !Z!)$3bB
public final static int SELECTION = 3; <&5z0rDKWw
public final static int SHELL = 4; +K4XMf
public final static int QUICK = 5; gmL~n7m:K
public final static int IMPROVED_QUICK = 6; )0"Q h
public final static int MERGE = 7; m!V,W*RNr
public final static int IMPROVED_MERGE = 8; E=sh^Q(A
public final static int HEAP = 9; U zy@\
|#TU"$;
public static void sort(int[] data) { s.2f'i+
sort(data, IMPROVED_QUICK); /G||_Hc
} nQF&^1n
private static String[] name={ 1V%tev9a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5 D|#l*V
}; s6`E.Eevm
7H6Ts8^S
private static Sort[] impl=new Sort[]{ E2e"A I.h
new InsertSort(), clE9I<1v
new BubbleSort(), p*g Fr hm
new SelectionSort(), dN{At-
new ShellSort(), E)v~kC}7.
new QuickSort(), [EAOk=X
new ImprovedQuickSort(), jBLTEb
new MergeSort(), o=m5AUe?J
new ImprovedMergeSort(), PUdv1__C
new HeapSort() RNT9M:w
}; PucNu8
eD>b|U=/
public static String toString(int algorithm){ "#d$$ 8
return name[algorithm-1]; 9[eiN
} S<mZs;
i).%GMv*r
public static void sort(int[] data, int algorithm) { T\6Qr$t
impl[algorithm-1].sort(data); f1'ByV'2
} ]iV]7g8:
&CG94
public static interface Sort { )."ob=m
public void sort(int[] data); ^twyy9VR
} YU,zQ V'
z g7Q`
public static void swap(int[] data, int i, int j) { {v"f){
int temp = data; }<Ydj .85
data = data[j]; 1mFH7A($
data[j] = temp; }8O9WS
} 7[Us.V@
} *bK=<{d1P