[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; X>Vc4n<}
} =w!ik9
int i1=l; ~x^y5[5{
int i2=mid+1; Wk<fNHg
for(int cur=l;cur<=r;cur++){ a(|6)w-
if(i1==mid+1) Td'Mc-/
data[cur]=temp[i2++]; RbX9PF"|+
else if(i2>r) )"S%'myj
data[cur]=temp[i1++]; I@MG?ZQ
else if(temp[i1] data[cur]=temp[i1++]; uhh7Ft#H
else Xj 1Oxm42
data[cur]=temp[i2++]; :YI5O/gsk?
} _6nAxm&x`%
} u<Kowt<ci
kU[hB1D5
} F#gA2VCm
l!f_ +lv
改进后的归并排序: /@F'f@;
x%l(0K
package org.rut.util.algorithm.support; "esuLQC
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import org.rut.util.algorithm.SortUtil; H-PVV&r
.;]WcC<3
/** pL"{Uqi
* @author treeroot x ;|HT
* @since 2006-2-2 :QGkYJ
* @version 1.0 oFj_o
*/ ^e8xg=8(
public class ImprovedMergeSort implements SortUtil.Sort { -K'UXoU1
8YFG*HSa
private static final int THRESHOLD = 10; taE p
r8s>s6vm
/* fAgeF$9@
* (non-Javadoc) rO7_K>g?
* )&@YRT\c?8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rx2)uUbR
*/ 9j:]<?D,A
public void sort(int[] data) { @."K"i'Bl
int[] temp=new int[data.length]; gx.\H3y
mergeSort(data,temp,0,data.length-1); 2iG+Ek-?"
} 1'qXT{f/~
rLsY_7!
private void mergeSort(int[] data, int[] temp, int l, int r) { L5bq\
int i, j, k; ?6CLUu|7n
int mid = (l + r) / 2; &DWSf`:Hx
if (l == r) M-nRhso
return; 0]4X/u#N
if ((mid - l) >= THRESHOLD) YVMvT>/,
mergeSort(data, temp, l, mid); 5@2Rl>B$
else 2Mt$Dah
insertSort(data, l, mid - l + 1); ,Z~`aHhr
if ((r - mid) > THRESHOLD) !T,<p
mergeSort(data, temp, mid + 1, r); x4I!f)8Q
else tnJ7m8JmC
insertSort(data, mid + 1, r - mid); O2Qmz=%
h9QM nH'
for (i = l; i <= mid; i++) { SaXt"Ju,AH
temp = data; EHwb?{
} klUV&O+=%
for (j = 1; j <= r - mid; j++) { ^ 8}P_
temp[r - j + 1] = data[j + mid]; K1 "HJsj
} yMNJHiE/
int a = temp[l]; K,g6y#1"
int b = temp[r]; M{J>yN
for (i = l, j = r, k = l; k <= r; k++) { 9<u&27.
if (a < b) { h-96 2(LG
data[k] = temp[i++]; >%tP"x{
a = temp; |8'}mjs.Q
} else { 9WG=3!-@
data[k] = temp[j--]; ,/?J!W@m
b = temp[j]; AwZ@)0Wy
} Ak?9a_f
} M2Nh3ijr
} f SkC>mWv
h"1}j'2>@
/** Fqeqn[,
* @param data }k VC]+
* @param l }dN\bb{#
* @param i P8YnKyI,.
*/ LA6XTgcu
private void insertSort(int[] data, int start, int len) { g=\(%zfsxr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !0l|[c4 e>
} jA1S|gV
} xRWfZ3E#
} oDZZ
} TB>_#+:
E!Q@AZ
堆排序： BbX$R`f
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package org.rut.util.algorithm.support; Tv|'6P
}ekNZNcuM
import org.rut.util.algorithm.SortUtil; JPDxzp
lf(+]k30
/** wrkw,H
* @author treeroot P'Y(f!%
* @since 2006-2-2 u0wu\
* @version 1.0 j EbmW*
*/ $*{,Z<|2
public class HeapSort implements SortUtil.Sort{ ;l;jTb^l
"Erphn
/* (non-Javadoc) NuO@Nr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DNmC
*/ \Q#pu;Y*N]
public void sort(int[] data) { Zna6-0o
MaxHeap h=new MaxHeap(); ~;HASHu
h.init(data); Kh3i.gm7g
for(int i=0;i h.remove(); {Vu=qNx
System.arraycopy(h.queue,1,data,0,data.length); \;-Yz
} niS\0ZA
YMw,C:a4
private static class MaxHeap{ 4m\Cc_:jO
@lzq`SzM
void init(int[] data){ F[coa5
this.queue=new int[data.length+1]; eYv^cbO@:
for(int i=0;i queue[++size]=data; Tcy9oYh!Pn
fixUp(size); &5HI
} yFAUD ro
} QO$18MBcc
<@M5 C-hH
private int size=0; ^h_rE |c
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private int[] queue; /[Nkk)8-
"I=Lbh-`
public int get() { -d?<t}a
return queue[1]; `&=%p|
} t]sk[
}D1?Z7p
public void remove() { HxR5&o
SortUtil.swap(queue,1,size--); F~v0CBcAL
fixDown(1); F4=X(P_6
} Ne9VRM P
file://fixdown 87pu\(,'
private void fixDown(int k) { JrxQ.,*i
int j; :MYLap&L&
while ((j = k << 1) <= size) { zW?=^bE
if (j < size %26amp;%26amp; queue[j] j++; 'Q*.[aJt
if (queue[k]>queue[j]) file://不用交换 lNe5{'OrO
break; "Z';nmv'N
SortUtil.swap(queue,j,k); f. h3:_r
k = j; $U&p&pgH=W
} .' v$PEy
} Gp_flGdGQ
private void fixUp(int k) { ;<MHl[jJD
while (k > 1) { 4<EC50@.
int j = k >> 1; Ga^:y=m
if (queue[j]>queue[k]) "6~+-_:
break; A{3nz DLI
SortUtil.swap(queue,j,k); ]:#W$9,WL
k = j; h1Y^+A_
} tPk>hzW
} ^S|}<6~6b
p=[I;U-#H
} Eb'M< ZY
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} 5HB*
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SortUtil： PTQN.[bBh
=OrVaZ0
package org.rut.util.algorithm; 1n)YCSA
Bi/E{k,
import org.rut.util.algorithm.support.BubbleSort; tHvP0RxM
import org.rut.util.algorithm.support.HeapSort; )*}?EI4.
import org.rut.util.algorithm.support.ImprovedMergeSort; @]]\r.DG
import org.rut.util.algorithm.support.ImprovedQuickSort; A)#Fyde
import org.rut.util.algorithm.support.InsertSort; eOb)uIF
import org.rut.util.algorithm.support.MergeSort; P-Gp^JX8
import org.rut.util.algorithm.support.QuickSort; H ~<.2b
import org.rut.util.algorithm.support.SelectionSort; F${}n1D
import org.rut.util.algorithm.support.ShellSort; F)aF.'$-/
R-k~\vCW
/** vgn,ZcX
* @author treeroot P#:nXc$
* @since 2006-2-2 9*s:Vff{
* @version 1.0 Q{ g{
*/ eS%8WmCV9<
public class SortUtil { ^%1u3
public final static int INSERT = 1; #/t+h#jG
public final static int BUBBLE = 2; {XXnMO4uR;
public final static int SELECTION = 3; ;t/KF"
public final static int SHELL = 4; $F/xv&t
public final static int QUICK = 5; PmE8O
public final static int IMPROVED_QUICK = 6; <pFbm
public final static int MERGE = 7; i_y%HG
public final static int IMPROVED_MERGE = 8; n&Q0V.
public final static int HEAP = 9; DRVvC~M-,
n482?Wp
public static void sort(int[] data) { Rd@?2)Xm
sort(data, IMPROVED_QUICK); *]Eyf")
} :@Ml-ZE
private static String[] name={ JGYJ;j{E]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LmKY$~5P
}; kb\\F:w(W
5p7i9"tgn
private static Sort[] impl=new Sort[]{ Q ~eh_>"
new InsertSort(), RRpCWcIv"
new BubbleSort(), yx<-M
new SelectionSort(), 4^^=^c
new ShellSort(), jU{~3Gn?
new QuickSort(), 94lz?-j
new ImprovedQuickSort(), ~'Korxa
new MergeSort(), US<l4
new ImprovedMergeSort(), r+a0.
new HeapSort() @><8YN^)%
}; 7Xh ;dJAF3
+~xzgaL
public static String toString(int algorithm){ ,y)V5 c1
return name[algorithm-1]; T|--ZRYn
} F~GIfJU
\O*W/9 +
public static void sort(int[] data, int algorithm) { 7#PQ1UWl
impl[algorithm-1].sort(data); (ul_bA+
} %y+v0.aWH+
bc6|]kB:
public static interface Sort { "Qk)EY
public void sort(int[] data); pWeD,!f
} MZ^(BOe_
ZQsVSz( 1
public static void swap(int[] data, int i, int j) { 5_rx$avm
int temp = data; /vLW{%
data = data[j]; DH])Q5
data[j] = temp; .aC/ g?U
} 2t3)$\ylQp
} AD7&-=p&w