[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; Yr&Ka:
} &:#m&,tQ
int i1=l; qSiWnN8D t
int i2=mid+1; xX@FWAj
for(int cur=l;cur<=r;cur++){ [>w%CY<Fd
if(i1==mid+1) 7!2 HNg
data[cur]=temp[i2++]; MC=G"m:_
else if(i2>r) W8aU"_
data[cur]=temp[i1++]; {0's~U+@
else if(temp[i1] data[cur]=temp[i1++]; KAb(NZK
else :%tuNJjj
data[cur]=temp[i2++]; xFsmf<Vm
} %cW;}Y[?P
} d(L{!mm
vD=%`G[m
} ]h~o],:
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改进后的归并排序: HcJE0-"
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package org.rut.util.algorithm.support; YU\Gj S~>&
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import org.rut.util.algorithm.SortUtil; Hq xK\m%,.
C{Blqf3V0
/** W(@>?$&
* @author treeroot zk>h u<_
* @since 2006-2-2 Q\#UWsN(T/
* @version 1.0 v*P[W_.
*/ 9e5gy
public class ImprovedMergeSort implements SortUtil.Sort { vR]mSX3)?
AMk~dzNt
private static final int THRESHOLD = 10; %ejeyc
yDtOpM8<{
/* #AncOo
* (non-Javadoc) 6An{3"
* K}2Npo FS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "T*I|
*/ ?~)Ak`=
public void sort(int[] data) { "=A|K~b
int[] temp=new int[data.length]; sx-F8:Qa
mergeSort(data,temp,0,data.length-1); c$#GM57V
} %c1FwAC
$Sb@zLi)
private void mergeSort(int[] data, int[] temp, int l, int r) { k!13=Gh
int i, j, k; j)6G7T|
int mid = (l + r) / 2; 7!- \L7<
if (l == r) X')S;KW
return; [.U^Wrd
if ((mid - l) >= THRESHOLD) ;](h2Z`3s
mergeSort(data, temp, l, mid); WF)s*$'uz;
else ^Fp=y,D
insertSort(data, l, mid - l + 1); 0P9Wy!f7
if ((r - mid) > THRESHOLD) ;o >WXw
mergeSort(data, temp, mid + 1, r); CZfE |T~
else l"L+e!B~
insertSort(data, mid + 1, r - mid); #HDesen
0UD"^zgY
for (i = l; i <= mid; i++) { Dqr9Vv
temp = data; .93S>U<_
} oeGS
for (j = 1; j <= r - mid; j++) { F '#^`G9
temp[r - j + 1] = data[j + mid]; +:y&{K
} 3k{c$x}
int a = temp[l]; x3;jWg~'
int b = temp[r]; =phiD&=
for (i = l, j = r, k = l; k <= r; k++) { h60\ Y 8
if (a < b) { ) MBS
data[k] = temp[i++]; xSOoIsL[
a = temp; J=P;W2L
} else { TMY{OI8a
data[k] = temp[j--]; Z~RdFC
b = temp[j]; U IQ 6SvM
} 1t%<5O;R
} 6puVw-X
} 1<ehV VP
zf7rF}
/** O,]_ tp
* @param data um}N%5GAa
* @param l qSR?,G
* @param i ^Yr|K
*/ :o<N!*pT
private void insertSort(int[] data, int start, int len) { R ^^1/%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NlMQHma
} 4[xA- \
} X{s/``n
} uegb;m
} .f+9 A>
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堆排序： Es~DHX
v0u\xX[H;
package org.rut.util.algorithm.support; VlV)$z_
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import org.rut.util.algorithm.SortUtil; F*X%N_n
X-v~o/r7
/** bWUS9WT
* @author treeroot oX#9RW/ >I
* @since 2006-2-2 u IF$u
* @version 1.0 p/4S$ j#Tn
*/ !rz)bd3$
public class HeapSort implements SortUtil.Sort{ Kj=;>u
Ef-a4Pi
/* (non-Javadoc) $Llvp bl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =;g=GcVK
*/ ?U$}Rsk{#
public void sort(int[] data) { <gR`)YF7
MaxHeap h=new MaxHeap(); a2[8wv1
h.init(data); jJ*=Ghu-
for(int i=0;i h.remove(); GU5W|bS
System.arraycopy(h.queue,1,data,0,data.length); o;*]1
} yIlV[_
Sr-|,\/O
private static class MaxHeap{ _>;&-e
\N4d_fPj
void init(int[] data){ 0&f\7z
this.queue=new int[data.length+1]; $}V7(wu 6@
for(int i=0;i queue[++size]=data; CN-4-
fixUp(size); 6/VNuQ_#
} Cv0&prt
} AmgWj/>
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private int size=0; "h QV9 [2\
otoBb^Mz
private int[] queue; t2Ip\>;9f
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public int get() { R9bhC9NP
return queue[1]; ]DGGcUk7
} n#)PvV~
]v<d0"2
public void remove() { O{Dm;@J-aM
SortUtil.swap(queue,1,size--); a4Ls^
fixDown(1); Ck:#1-t8{
} Al=(sHc'
file://fixdown 9/FG,9
private void fixDown(int k) { Q%+}
int j; 5XI;<^n2
while ((j = k << 1) <= size) { xGwTk
if (j < size %26amp;%26amp; queue[j] j++; p1Y+
if (queue[k]>queue[j]) file://不用交换 lt&$8jh
break; fFjLpl
SortUtil.swap(queue,j,k); P=&'wblm?
k = j; !T)T_P[
} F\zkyk4
} mJSK; @w<O
private void fixUp(int k) { =DGn,i9
while (k > 1) { B:B8"ODV
int j = k >> 1; w9/nVu
if (queue[j]>queue[k]) 0Z@ARMCe|m
break; (s5<
SortUtil.swap(queue,j,k); B>{|'z?%>
k = j; bELIRM9
} MV% :ES?
} I93 ~8wQ
y{@P1{
} q-A`/9
dMey/A/VYt
} ;r gH}r
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SortUtil： R.91v4J
:= ]sq}IN
package org.rut.util.algorithm; (y-x01H
C}n[?R
import org.rut.util.algorithm.support.BubbleSort; Oqd"0Qt-
import org.rut.util.algorithm.support.HeapSort; *?EO n-
import org.rut.util.algorithm.support.ImprovedMergeSort; }pbBo2
import org.rut.util.algorithm.support.ImprovedQuickSort; /'R UA
import org.rut.util.algorithm.support.InsertSort; R;0W+!fE
import org.rut.util.algorithm.support.MergeSort; c1pq]mz|z
import org.rut.util.algorithm.support.QuickSort; JRHf.?
import org.rut.util.algorithm.support.SelectionSort; BM|-GErE
import org.rut.util.algorithm.support.ShellSort; 3'?h;`v\Lo
A2}Z *U(;
/** *p""YEN
* @author treeroot -}=@ *See#
* @since 2006-2-2 73&]En
* @version 1.0 IyrZez
*/ *37LN
public class SortUtil { +A]&AkTw
public final static int INSERT = 1; 1zh$IYrd
public final static int BUBBLE = 2; E}xz7u
public final static int SELECTION = 3; H.jLGe>
public final static int SHELL = 4; t}5'(9
public final static int QUICK = 5; 3g?MEM~
public final static int IMPROVED_QUICK = 6; H arFo
public final static int MERGE = 7; p2pTs&}S
public final static int IMPROVED_MERGE = 8; ^Nd|+}
public final static int HEAP = 9; Sf+(1_^`t
}9L 40)8
public static void sort(int[] data) { a)I=U[
sort(data, IMPROVED_QUICK); P@gu~!
} pb=jvK
private static String[] name={ g`%ED0aR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o8~f
}; XV74Fl
e8~62O^
private static Sort[] impl=new Sort[]{ {B'Gm]4
new InsertSort(), ",MK'\E
new BubbleSort(), IeRl6r%:
new SelectionSort(), mp&Le YYn
new ShellSort(), "i!2=A8k
new QuickSort(), JxX jDYrU
new ImprovedQuickSort(), 4 +da
new MergeSort(), *b$z6.
new ImprovedMergeSort(), _4~ng#M*
new HeapSort() 5@w'_#!)
}; q#mFN/.(+
'0'"k2"vC
public static String toString(int algorithm){ 1Y H4a|bc
return name[algorithm-1]; gt2>nTJz.Z
} ]ro1{wm!WU
JL" 3#p}
public static void sort(int[] data, int algorithm) { V\iIvBpWg
impl[algorithm-1].sort(data); 5~`|)~FA
} Ez7V>FNX
~|aeKtCs(.
public static interface Sort { '_TJ"lOZ
public void sort(int[] data); NDs]}5#
} J9b?}-O)
FT|/WZR
public static void swap(int[] data, int i, int j) { ZaukMEq
int temp = data; w*&n(zJF>
data = data[j]; 42n@:5`{+
data[j] = temp; N=O+X~
} u7WTSL%
} e5WdK