[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; H(DI /"N
} QJ,~K&?
int i1=l; /J!~0~F
int i2=mid+1; LRPdA "Z
for(int cur=l;cur<=r;cur++){ v,c;dlg_
if(i1==mid+1) Vo9FlYj
data[cur]=temp[i2++]; /gP"X1.
else if(i2>r) 9^@#Ua
data[cur]=temp[i1++]; e/zz.cd){
else if(temp[i1] data[cur]=temp[i1++]; &"=<w
else !=]cASPGD
data[cur]=temp[i2++]; 9G)fJr[c
} +K48c,gt?
} QxiAC>%K
iz2;xa*
} Xbc:Vr
m'U>=<!D
改进后的归并排序: m]&y&oz
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package org.rut.util.algorithm.support; MZ_dI"J,
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import org.rut.util.algorithm.SortUtil; m">2XGCn
WB\chb%ej#
/** ^F87gow%`B
* @author treeroot 8:k-]+#o
* @since 2006-2-2 ( c +M"s
* @version 1.0 c Sktm&SP
*/ ,R=)^Gh{
public class ImprovedMergeSort implements SortUtil.Sort { k.wm{d]J
nw=:+?
private static final int THRESHOLD = 10; :</KgR0I
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/* BCt>P?,UO
* (non-Javadoc) BoofJm
* ]EEac
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q6d>tqWhq
*/ trlZ
public void sort(int[] data) { 9%DLdc\z;
int[] temp=new int[data.length]; u=ZZ;%Rvd
mergeSort(data,temp,0,data.length-1); gCM(h[7A
} %Ktlez:S
RIq\IQ_|
private void mergeSort(int[] data, int[] temp, int l, int r) { .|GnTC q
int i, j, k; Z"E2ZSa0
int mid = (l + r) / 2; .>^U mM
if (l == r) =HHb ]JE
return; 6IKi*}
if ((mid - l) >= THRESHOLD) v+ "9&
mergeSort(data, temp, l, mid); :CG;:( |
else %=5m!"F
insertSort(data, l, mid - l + 1); G9h Bp
if ((r - mid) > THRESHOLD) jNW/Biy4u
mergeSort(data, temp, mid + 1, r); @"0n8y
else aV G4Df
insertSort(data, mid + 1, r - mid); jiP^Hz"e
.p-T >
for (i = l; i <= mid; i++) { wZ/b;%I!
temp = data; :{~TG]4M
} [wcp2g3Px
for (j = 1; j <= r - mid; j++) { W+#Zmvo
temp[r - j + 1] = data[j + mid]; "\"sM{x
} 0-8'.C1v
int a = temp[l]; Yn8aTg[J
int b = temp[r]; ;%4N@Z
for (i = l, j = r, k = l; k <= r; k++) { "PC9[i
if (a < b) { zOMU&;.\
data[k] = temp[i++]; <Y^)/ s
a = temp; !}L cJ
} else { JmbWEX|
data[k] = temp[j--]; 90!67Ap`x
b = temp[j]; #LfoG?k1K
} z&Lcl{<MA
} Fd>epvR
} pxHJX2
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/** }M~[8f ]
* @param data N6!$V7oT
* @param l YfVZ59l4y6
* @param i "sUmke-#
*/ ^(1S`z$
private void insertSort(int[] data, int start, int len) { L+NrU+:=C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {'[S.r`
} jCL 1Bj
} VZr AZV^c
} cGS7s 8U
} O 718s\#
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堆排序： \Wf1b8FW
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package org.rut.util.algorithm.support; oVeC@[U
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import org.rut.util.algorithm.SortUtil; | gP%8nh'C
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/** 4i(?5p>f
* @author treeroot ;<nQl,2N
* @since 2006-2-2 &\AW}xp
* @version 1.0 vXeI)vFK
*/ I'%ASZ
public class HeapSort implements SortUtil.Sort{ Un\ T} c
{[[/*1r|
/* (non-Javadoc) wZKEUJpQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?m dGMf)
*/ fb D
public void sort(int[] data) { \Qei}5P,
MaxHeap h=new MaxHeap(); T:!Re*=JJ
h.init(data); CL<m+dW%*
for(int i=0;i h.remove(); ]rc=oP;
System.arraycopy(h.queue,1,data,0,data.length); eTZ2f
} "i~~Q'=7
i|QL6e*0
private static class MaxHeap{ u]s}@(+.
&T\,kq>)
void init(int[] data){ zOA2chy4
this.queue=new int[data.length+1]; eWTbHF
for(int i=0;i queue[++size]=data; FmC [u
fixUp(size); 4?.L+wL
} )1o<}7
} yf2$HF
A!^gF~5
private int size=0; |!"qz$8fB
~=Q Tv8
private int[] queue; ]%Z7wF</
*#Hw6N0#
public int get() { \#q|.d$u
return queue[1]; p _q]Rt
} 4-Cca
y(*#0fJrTV
public void remove() { CyD)=e{
SortUtil.swap(queue,1,size--); kyu PN<?
fixDown(1); A,]%*kg2
} B dKD%CJ[
file://fixdown m!_*Q
private void fixDown(int k) { vDcYz,
int j; j=n<s</V
while ((j = k << 1) <= size) { #Iwxt3K
if (j < size %26amp;%26amp; queue[j] j++; c`xgz#]v
if (queue[k]>queue[j]) file://不用交换 a474[?
break; CCU<t Q
SortUtil.swap(queue,j,k); Ff{dOV.i
k = j; Tb<}GcwJ
} =Bw2{]w
} L1YiXJ,T,
private void fixUp(int k) { DBk]2W|i
while (k > 1) { ;)rXQm
int j = k >> 1; o2W^!#]=
if (queue[j]>queue[k]) 0. mS^g,M-
break; 6uKS!\EY|
SortUtil.swap(queue,j,k); BSHtoD@e7
k = j; R;`C;Rbf
} a/dq+
} <zt124y-6
tl+ 9SBl
} S0mzDLgE
j6DI$tV~
} ?OF9{$m3?
9#b/D&pX5
SortUtil： ky=h7#wdv-
#gSLFM{p
package org.rut.util.algorithm; +wxDK A_
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import org.rut.util.algorithm.support.BubbleSort; `PS>"-AY2
import org.rut.util.algorithm.support.HeapSort; 5`p>BJ+n
import org.rut.util.algorithm.support.ImprovedMergeSort; vXT>Dc2\!
import org.rut.util.algorithm.support.ImprovedQuickSort; +~f=L- >
import org.rut.util.algorithm.support.InsertSort; 2VaKt4+`
import org.rut.util.algorithm.support.MergeSort; (Fs{~4T
import org.rut.util.algorithm.support.QuickSort; TeNPuY~WP
import org.rut.util.algorithm.support.SelectionSort; Aqo90(jffx
import org.rut.util.algorithm.support.ShellSort; U6F1QLSLz
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/** z#^;'nnw
* @author treeroot yoG*c%3V?
* @since 2006-2-2 5&TH\2u
* @version 1.0 f[wxt n'r
*/ a6!|#rt
public class SortUtil { ':!aFMj^
public final static int INSERT = 1; I'0{Q`}
public final static int BUBBLE = 2; &gsBbQ+qA
public final static int SELECTION = 3; h&2l0|8k
public final static int SHELL = 4; OTzuOP8
public final static int QUICK = 5; +F+M[ef<ws
public final static int IMPROVED_QUICK = 6; >)+N$EN
public final static int MERGE = 7; wEC,Mbn
public final static int IMPROVED_MERGE = 8; M< /
public final static int HEAP = 9; ;@xlrj+
4d\V=_);r
public static void sort(int[] data) { V6Y0#sTU
sort(data, IMPROVED_QUICK); `G`yA%
} c3.;o
private static String[] name={ xSq{pxX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '^M.;Giz
}; ZlP+t>
n j2=}6
private static Sort[] impl=new Sort[]{ ;OZl' . %`
new InsertSort(), |enb5b78
new BubbleSort(), "3/&<0k
new SelectionSort(), BhhFij4
new ShellSort(), <QD[hO^/
new QuickSort(), y/+IPR
new ImprovedQuickSort(), psUT2
new MergeSort(), q _Z+H4
new ImprovedMergeSort(), hLj7i?
new HeapSort() 0o!mlaU#
}; }=Ul8 <
aK/fZ$Qc
public static String toString(int algorithm){ _@W1?;yD
return name[algorithm-1]; %j.n^7i]^:
} ~;#sj&~
R3%%;`c=
public static void sort(int[] data, int algorithm) { qA"BoSw4
impl[algorithm-1].sort(data); 51Vqbtj^
} %SuELm
1D_&n@
public static interface Sort { UE/JV_/S;
public void sort(int[] data); t YxN^VqU
} nW}jTBu_K+
LI].*n/v
public static void swap(int[] data, int i, int j) { t<o7 S:a"
int temp = data; '6; {DX
data = data[j]; o(4gh1b%
data[j] = temp; 05g %5vHF
} U.X`z3q
} 5z =}o/?