[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; _}F&^
} 'gY?=,dF>
int i1=l; SY,ns*>1F
int i2=mid+1; NfoHQU<n
for(int cur=l;cur<=r;cur++){ MSCH6R"5
if(i1==mid+1) Ti? "Hr<W
data[cur]=temp[i2++]; d:'{h"M6
else if(i2>r) &{Z+p(3Gj
data[cur]=temp[i1++]; aT,WXW*
else if(temp[i1] data[cur]=temp[i1++]; 2XR!2_)O5
else K*:=d}^
data[cur]=temp[i2++]; T\gs
} wq?"NQ?O<
} iHv+I~/
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} 7m#EqF$P
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改进后的归并排序: lf=G
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package org.rut.util.algorithm.support; PhAfEsD
jRsl/dmy
import org.rut.util.algorithm.SortUtil; |b\a)1Po:
z};|.N}
/** rZgu`5<a
* @author treeroot - |peD L
* @since 2006-2-2 ThV>gn5
* @version 1.0 y3;M$Jr
*/ XpANaqH\
public class ImprovedMergeSort implements SortUtil.Sort { oXZWg~&l^
PJK:LZw
private static final int THRESHOLD = 10; .i;.5)shsu
LH54J;7Y
/* `oMZ9Gq2E
* (non-Javadoc) QvbH " 7
* "}X+vd``
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /4+L2O[
*/ "nz\YQdg
public void sort(int[] data) { r5gqRh}+
int[] temp=new int[data.length]; '-"[>`[q
mergeSort(data,temp,0,data.length-1); ~7b#BXzP
} oaj.5hM
2D:/.9= 8v
private void mergeSort(int[] data, int[] temp, int l, int r) { _)j\ b
int i, j, k; ! VT$U6
int mid = (l + r) / 2; |OLXb+7X
if (l == r) r`-8+"P
return; 3/gR}\=
if ((mid - l) >= THRESHOLD) ;8<HB1 &,
mergeSort(data, temp, l, mid); %oqKpD+
else \dQc!)&C9
insertSort(data, l, mid - l + 1); %f CkR`:
if ((r - mid) > THRESHOLD) +o@:8!IM1
mergeSort(data, temp, mid + 1, r); `a52{Wa
else #|T"6jJaQ
insertSort(data, mid + 1, r - mid); fTpG>*{p
r],%:imGr
for (i = l; i <= mid; i++) { qMEd R;o
temp = data; r\QV%09R
} K Zg NL|
for (j = 1; j <= r - mid; j++) { I:t?#)wl
temp[r - j + 1] = data[j + mid]; 1>[#./@
} .RmFYV0,
int a = temp[l]; )*_G/<N)|
int b = temp[r]; vJs6nVbK
for (i = l, j = r, k = l; k <= r; k++) { 9Tr ceL;
if (a < b) { Pek[j)g}
data[k] = temp[i++]; 4"|3pMr
a = temp; VsTgK
} else { z#Qe$`4&
data[k] = temp[j--]; 4Y'Ne2M{
b = temp[j]; _8r'R
} p5qfv>E8)
} /&\V6=jA1
} X9PbU1o;
@-K[@e/uwy
/** ;07$G+['
* @param data %h(%M'm?
* @param l MtwlZg`c3
* @param i :@5{*o
*/ =^p}JhQ
private void insertSort(int[] data, int start, int len) { 9BP'[SM%),
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gJp6ReZ#
} O`Qke Z}
} T*@o?U
} 02J(*_o
} P(yLRc
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堆排序： sMAj?]hI$
Q7e4MKy7
package org.rut.util.algorithm.support; 6p@[U>`
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import org.rut.util.algorithm.SortUtil; =c 9nC;C
'4d4i
/** S]=.p-Am
* @author treeroot S0OL;[*.
* @since 2006-2-2 OYxYlUq
* @version 1.0 Jw=7eay$F
*/ &x B^
public class HeapSort implements SortUtil.Sort{ $Tv~ *|a
PSv 5tQhm
/* (non-Javadoc) @"h4S*U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X]9<1[f
*/ lH?jqp
public void sort(int[] data) { z9&j
MaxHeap h=new MaxHeap(); BPkL3Ev1V
h.init(data); %5+X
for(int i=0;i h.remove(); J~J+CGT~2
System.arraycopy(h.queue,1,data,0,data.length); Z #
} /Z]nV2$n)V
I9L3Y@(f6m
private static class MaxHeap{ (e5Z^9X
^w%%$9=:r
void init(int[] data){ b3_P??yp
this.queue=new int[data.length+1]; !wUznyYwt
for(int i=0;i queue[++size]=data; '/XP4B\(E
fixUp(size); .|u`s,\
} ,[ppETz
} $bKXP(
E@otV6Wk[@
private int size=0; {S+?n[1r\
?7)v:$(G}
private int[] queue; 4~A$u^scn
qLX<[UL
public int get() { .3UJ*^(?
return queue[1]; ?fP3R':s
} Y|b,pC|,
^ )"Il
public void remove() { CG@Fn\J
SortUtil.swap(queue,1,size--); ,]ySBAO
fixDown(1); \"RCJadK
} XXX y*/P
file://fixdown ld#x'/
private void fixDown(int k) { M]k Q{(
int j; xMQ>,nZ
while ((j = k << 1) <= size) { At[Q0'jkc
if (j < size %26amp;%26amp; queue[j] j++; |*w)]2Bl
if (queue[k]>queue[j]) file://不用交换 :zo5`[P
break; e(0cz6
SortUtil.swap(queue,j,k); 9[X'9*,
k = j; .czUJyFms}
} 2<OU)rVE4
} -z. wAp
private void fixUp(int k) { l="X|t
while (k > 1) { dHiir&Rd9`
int j = k >> 1; 4x-,l1NMR
if (queue[j]>queue[k]) K%L6UQ;
break; H-&27?s^
SortUtil.swap(queue,j,k); T<>B5G~%
k = j; ]!!?gnPd5
} 4Zu1G#(zP
} E0VAhN3G\
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} A{-S )Z3}
fnr8{sr.2Z
} <]%6x[
%U}6(~
SortUtil： jK/FzD0-
"|J6*s
package org.rut.util.algorithm; 4yqYs>
XP!m]\E&I
import org.rut.util.algorithm.support.BubbleSort; {E(2.'d
import org.rut.util.algorithm.support.HeapSort; #r"|%nOfY
import org.rut.util.algorithm.support.ImprovedMergeSort; h4KMhr
import org.rut.util.algorithm.support.ImprovedQuickSort; 2DsP "q79k
import org.rut.util.algorithm.support.InsertSort; urkuG4cY
import org.rut.util.algorithm.support.MergeSort; )lt1I\n*k
import org.rut.util.algorithm.support.QuickSort; f{L;,
import org.rut.util.algorithm.support.SelectionSort; 2`;XcY4A
import org.rut.util.algorithm.support.ShellSort; 1}c/l<d
~.G$0IJY
/** ^{IZpT3
* @author treeroot ;u(*&vRqr^
* @since 2006-2-2 T?[;ej:
* @version 1.0 vOCaru?~h
*/ s&o9LdL
public class SortUtil { I:oEt
public final static int INSERT = 1; Ebj0 {ZL
public final static int BUBBLE = 2; 1 Vc_jYO@
public final static int SELECTION = 3; ECM#J28D
public final static int SHELL = 4; VFF5Tp
public final static int QUICK = 5; j+-`P5
public final static int IMPROVED_QUICK = 6; 2/t;}pw8
public final static int MERGE = 7; j>\rs|^O
public final static int IMPROVED_MERGE = 8; Z@x&
public final static int HEAP = 9; GK,{$SC+=
PX^k;
public static void sort(int[] data) { uUHWTyoO
sort(data, IMPROVED_QUICK); 3SbZD
} 2+)h!y]
private static String[] name={ mh[,E8'd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DFZ@q=ZT
}; w0nbL^f
):tv V
private static Sort[] impl=new Sort[]{ z]%@r 7
new InsertSort(), d)biMI}<5
new BubbleSort(), u=s,bt,"5
new SelectionSort(), <4;, y*"n
new ShellSort(), bp?TO]LH
new QuickSort(), KK>jV
new ImprovedQuickSort(), W!.FnM5x
new MergeSort(), zb[kRo&a0W
new ImprovedMergeSort(), g%]<sRl:-
new HeapSort() PCgr`($U
}; (>u1O V
+,R!el!o~u
public static String toString(int algorithm){ `%#_y67v
return name[algorithm-1]; KLG.?`h:
} r8*xp\/
!WGQ34R{
public static void sort(int[] data, int algorithm) { paN=I=:*M
impl[algorithm-1].sort(data); &-^*D%9
} (DvGA I
NRG~ya >
public static interface Sort { ?xMTO
public void sort(int[] data); !.V_?aYi8
} BHgs,
N#-.[9!
public static void swap(int[] data, int i, int j) { =bJ$>Djp
int temp = data; }D)eS |B
data = data[j]; 3I}AA.h'00
data[j] = temp; #k>n5cR@0
} rmvrv.$3
} ' ZTRl+