[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; h2>0#Vp3j
} ,&-[$,
int i1=l; b$`O|S
int i2=mid+1; .phQ7":`
for(int cur=l;cur<=r;cur++){ ^wlep1D
if(i1==mid+1) <'-me09C*
data[cur]=temp[i2++]; FuKNH~MevQ
else if(i2>r) $W]bw#NH
data[cur]=temp[i1++]; Oc.>$
else if(temp[i1] data[cur]=temp[i1++]; !xI![N^
else =Vs<DO{|4q
data[cur]=temp[i2++]; H[r0jREK
} lg1D>=(mY
} f"Iyo:Wt
2?j1~]DvZ
} )B_h"5X4\y
zvD5i,I
改进后的归并排序: f/yK|[g~
>UMnItq(l
package org.rut.util.algorithm.support; }#J}8.
F'I6aE%
import org.rut.util.algorithm.SortUtil; kQ8WO|bA
tpN}9N
/** UwU]l17~
* @author treeroot UL%ihWq
* @since 2006-2-2 F?B=:8,}
* @version 1.0 #k)\e;,X
*/ ooQ(bF
public class ImprovedMergeSort implements SortUtil.Sort { B^9 #X5!
.yPx'_e
private static final int THRESHOLD = 10; ZTZE_[
bRp[N
/* WQx;tX
* (non-Javadoc) KfNXX>'
* %u}sVRJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :X f3wP=
*/ Vd4osBu{fY
public void sort(int[] data) { ;"Y6&YP<
int[] temp=new int[data.length]; #F@7>hd1
mergeSort(data,temp,0,data.length-1); M6iKl
} bG)MG0<TT
;>N ~,Q
private void mergeSort(int[] data, int[] temp, int l, int r) { #4M0%rN
int i, j, k; &/9oi_r%r
int mid = (l + r) / 2; t^hkGYj!2
if (l == r) SfUUo9R(sm
return; 3)Y:c2
if ((mid - l) >= THRESHOLD) <.ky1aex7
mergeSort(data, temp, l, mid); Dfia=1A
else $Stu-l1e a
insertSort(data, l, mid - l + 1); $P3nP=mf
if ((r - mid) > THRESHOLD) [3Rj?z"S
mergeSort(data, temp, mid + 1, r); L:-lqag!
else s`RJl V
insertSort(data, mid + 1, r - mid); '9@R=#nd
"[yiNJ"kt
for (i = l; i <= mid; i++) { sjm79/
temp = data; |T*qAJ8c
} R:N-y."La.
for (j = 1; j <= r - mid; j++) { +ctv]'P_
temp[r - j + 1] = data[j + mid]; K5&C}Ey1
} LnS>3$t*
int a = temp[l]; MFuI&u!g:
int b = temp[r]; c ?XUb[
for (i = l, j = r, k = l; k <= r; k++) { ~py0Vx,F
if (a < b) { BtChG] N|
data[k] = temp[i++]; @U@yIv
a = temp; ;4$C$r!t
} else { b_yXM
data[k] = temp[j--]; u,:`5*al{
b = temp[j]; Bw.&3efd
} 8[;oUVb5
} (B<AK4G
} KTt$Pt/.
Xkom@F~]
/** ton`ji\^
* @param data :g[x;Q[@
* @param l {LHe 6#
* @param i ~-wJ#E3g
*/ X:&p9_O@
private void insertSort(int[] data, int start, int len) { /}_c7+//
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :n9~H+!
} bK9~C" k
} C)s1' =TZ
} GK?R76d
} pIiED9
+z0}{,HX
堆排序： : "te-
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package org.rut.util.algorithm.support; \/'n[3x
5C1Rub)
import org.rut.util.algorithm.SortUtil; vqMk)htIz
5KE%@,k k
/** Ml?)Sc"\7
* @author treeroot PRC)GP&q
* @since 2006-2-2 /? 1Yf
* @version 1.0 L^1q/4${
*/ z.&%>%TPP
public class HeapSort implements SortUtil.Sort{ cE5Zxcn
?^ezEpW
/* (non-Javadoc) `sy &dyM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3,I >.3
*/ D*'M^k|1
public void sort(int[] data) { AO$PuzlLh
MaxHeap h=new MaxHeap(); zN/~a)
h.init(data); 2%C5P0;QX
for(int i=0;i h.remove(); 7u5\#|yL
System.arraycopy(h.queue,1,data,0,data.length); u%T$XG
} %yM' Z[-
N3p 7 0
private static class MaxHeap{ ."Ix#\|x
IPi<sE
void init(int[] data){ ugCS &
this.queue=new int[data.length+1]; h?3l
for(int i=0;i queue[++size]=data; Ny,A#-?
fixUp(size); MI'l4<>u
} PJ'lZu8?x
} V,"iMo
3(})uV
private int size=0; ivz?-X4]
w<>6>w@GZ
private int[] queue; wU)5Evp[
S{i@=:
public int get() { bSR+yr'?
return queue[1]; _JJKbi
} _% 9+U[@
) v5n "W
public void remove() { 7h9[-d6
SortUtil.swap(queue,1,size--); ^}/ E~Sg7\
fixDown(1); W$Q)aA7
} ,9tbu!Pvq
file://fixdown %_R|@cyD
private void fixDown(int k) { ^Xy$is3
int j; <C"N X
while ((j = k << 1) <= size) { ,x"yZ
if (j < size %26amp;%26amp; queue[j] j++; 8<wuH#2<y
if (queue[k]>queue[j]) file://不用交换 dF11Rj,~ 8
break; ^x"c0R^
SortUtil.swap(queue,j,k); |5B,cB_
k = j; FWpN:|X BS
} 4:eq{n
} Y:!/4GF
private void fixUp(int k) { xCp+<|1
while (k > 1) { {&}/p-S
int j = k >> 1; 2C33;?M
if (queue[j]>queue[k]) M|5]#2J_2
break; JlDDM %
SortUtil.swap(queue,j,k); >+jbMAYSq
k = j; fZV8o$V
} 7|M$W(P
} Z:lB:U'o
fJ&<iD)6
} [zTYiNa
PMN2VzE4{
} 7hF,gl5
akvwApn5
SortUtil： W^d4/]
g t^]32$
package org.rut.util.algorithm; 2VV[*QI
HEB/\
import org.rut.util.algorithm.support.BubbleSort; (\mulj
import org.rut.util.algorithm.support.HeapSort; $dZ>bXUw:
import org.rut.util.algorithm.support.ImprovedMergeSort; xngeV_xc2
import org.rut.util.algorithm.support.ImprovedQuickSort; N{V5 D
import org.rut.util.algorithm.support.InsertSort; &!DZW5
import org.rut.util.algorithm.support.MergeSort; F;Q_*0mIQ
import org.rut.util.algorithm.support.QuickSort; MX`Wg
import org.rut.util.algorithm.support.SelectionSort; `mKlv~$1^
import org.rut.util.algorithm.support.ShellSort; > 0Twr
h%1~v$W`
/** &ap`}^8pM
* @author treeroot vpeBQ=2\
* @since 2006-2-2 {GQ Aa
* @version 1.0 8>VI$
*/ [Zt# c C+
public class SortUtil { KI Plb3oh
public final static int INSERT = 1; hViprhC
public final static int BUBBLE = 2; =|gJb|?w
public final static int SELECTION = 3; 3Zaq#uA
public final static int SHELL = 4; N0K>lL=
public final static int QUICK = 5; cbh#E)['
public final static int IMPROVED_QUICK = 6; o,CA;_
public final static int MERGE = 7; uhTKCR~
public final static int IMPROVED_MERGE = 8; ~.W=
public final static int HEAP = 9; Wd^lt7(j
OC?Zw@
public static void sort(int[] data) { 18O@ 1M
sort(data, IMPROVED_QUICK); '"xL}8HX}
} +24|_Lx0
private static String[] name={ 3b|7[7}&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L_Y9+ e
}; )RA\kZ"
O>SuZ>g+7
private static Sort[] impl=new Sort[]{ i?a,^UM5n[
new InsertSort(), (0OSGG9
new BubbleSort(), oN[Fza>
new SelectionSort(), tKG;k"wk
new ShellSort(), "GwWu-GS
new QuickSort(), 192.W+H<
new ImprovedQuickSort(), L,b|Iq
new MergeSort(), Ws^+7u
new ImprovedMergeSort(), Evr2|4|O~
new HeapSort() to!mz\F
}; e0v9uQ%F5
dysX
public static String toString(int algorithm){ DOF?(:8Y
return name[algorithm-1]; 42Aje
} 8S.')<-f
W+d9cM=
public static void sort(int[] data, int algorithm) { C(F1VS
impl[algorithm-1].sort(data); u}-d7-=
} FylWbQU9
hF7V !*5
public static interface Sort { G}=`VYK
public void sort(int[] data); CdBthOPX)
} *Nvy+V
k_*XJ<S!Y
public static void swap(int[] data, int i, int j) { CF3E]dt
int temp = data; YW8K $W
data = data[j]; W>p\O9BG
data[j] = temp; 5E]UI YAkV
} hi;WFyJTu
} Exep+x-