[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; |LG4=j.l
} k;PAh>8
int i1=l; 2A`A\19t
int i2=mid+1; ^Jp&H\gI.
for(int cur=l;cur<=r;cur++){ (;x3} ]
if(i1==mid+1) <>eOC9;VY
data[cur]=temp[i2++]; KT|RF
else if(i2>r) mpC`Yk
data[cur]=temp[i1++]; Ok5<TZ6t4k
else if(temp[i1] data[cur]=temp[i1++]; @4d)R
else i!2TH~zl
data[cur]=temp[i2++]; oeSN9O
} qL6c`(0
} "@@I!RwA
^VW PdH/Fe
} UrlM%Jnq1
S0h'50WteJ
改进后的归并排序: 'AGto'Yy;
bUV >^d
package org.rut.util.algorithm.support; ,)+o
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import org.rut.util.algorithm.SortUtil; A61^[Y,dX_
Mj-vgn&/
/** ,H}_%}10
* @author treeroot 5IOFSy`
* @since 2006-2-2 #?MY&hdU9
* @version 1.0 JTqDr
*/ 5*PYT=p}
public class ImprovedMergeSort implements SortUtil.Sort { `0H g y=
c$S{^IQ
private static final int THRESHOLD = 10; .LVQx
Ng><n}
/* *b *G2f^
* (non-Javadoc) 682Z}"I0
* eg<bi@C1|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) # ,uya2!)
*/ %98' @$:0
public void sort(int[] data) { <99M@ cF
int[] temp=new int[data.length]; ]Y6cwZOe
mergeSort(data,temp,0,data.length-1); -m'j]1
} ^2d!*W|
N#V.1<Y
private void mergeSort(int[] data, int[] temp, int l, int r) { m^'uipa\
int i, j, k; lN,/3\B
int mid = (l + r) / 2; 5Dp#u
if (l == r) =4uSFK_L
return; AIb2k
if ((mid - l) >= THRESHOLD) 1XG!$4DW
mergeSort(data, temp, l, mid); OJT1d-5p
else YzosZ! L!<
insertSort(data, l, mid - l + 1); dpQG[vXe
if ((r - mid) > THRESHOLD) { pu85'DV
mergeSort(data, temp, mid + 1, r); ERwHLA
else V^y^ ;0I}[
insertSort(data, mid + 1, r - mid); =/<LSeLxH
T@}|zDC#
for (i = l; i <= mid; i++) { .)1_Ew
temp = data; hPq%Lc
} kdz=ltw
for (j = 1; j <= r - mid; j++) { -?]W*f
temp[r - j + 1] = data[j + mid]; #QCphhG
} 64Lx-avf
int a = temp[l]; R [H+qr
int b = temp[r]; Yw _+`,W
for (i = l, j = r, k = l; k <= r; k++) { !-s!f&_
if (a < b) { ,1'4o3
data[k] = temp[i++]; pZ`|iLNl-
a = temp; jF`BjxrG
} else { h%WE=\,Qp
data[k] = temp[j--]; umz;F
b = temp[j]; xw{-9k-~
} A5,t+8`aci
} -(#I3h;I
} EM>}0V
%h1N3\y9i(
/** y(R? ,wa=]
* @param data YV=QF J'
* @param l 2|\A7.
* @param i ld$i+6|
*/ =4GSg1Biy
private void insertSort(int[] data, int start, int len) { |6Gm:jV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +q6ydb,
} '`'GK&)
} =b;>?dP
} /iG*)6*^k
} yH][(o=2
sNun+xsf^
堆排序： 'B+ ' (f
&d7Z6P'`G
package org.rut.util.algorithm.support; "CiTa>x
]weoTn:
import org.rut.util.algorithm.SortUtil; NvM*h%ChM
.ROznCe}
/** "#mBcQ;QLV
* @author treeroot S9HwIH\m
* @since 2006-2-2 }68i[v9Njk
* @version 1.0 Nn>'^KZNG
*/ w[P4&?2:
public class HeapSort implements SortUtil.Sort{ f#ri'&}c :
0"~i^
/* (non-Javadoc) "~TA SX_?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M$f7sx
*/ O25lLNmO
public void sort(int[] data) { 8* Jw0mSw
MaxHeap h=new MaxHeap(); =4d (b ;
h.init(data); HF|oBX$_
for(int i=0;i h.remove(); w+1Gs ;
System.arraycopy(h.queue,1,data,0,data.length); @p\}pY$T
} J>d.dq>r
O-)-YVU
private static class MaxHeap{ " RxP^l
0!v->Dk
void init(int[] data){ p~LrPWHSTP
this.queue=new int[data.length+1]; n~VD uKn9
for(int i=0;i queue[++size]=data; <nEi<iAY>U
fixUp(size); G "P4-
} f6$b s+oP
} OtFh,}E
zbJT&@z
private int size=0; iR"N13
\9-"M;R.d
private int[] queue; G:g69=x y
O|_h_I-2
public int get() { C]Q8:6b
return queue[1]; ^*fQX1h<
} vloF::1
.F+@B\A<
public void remove() { DBP9{ x$
SortUtil.swap(queue,1,size--); 8QMPY[{
fixDown(1); !ct4;.2 D
} I-OJVZ( V
file://fixdown a22XDes=
private void fixDown(int k) { 1;VHM'
int j; cX3lt5
while ((j = k << 1) <= size) { ws4cF N9P?
if (j < size %26amp;%26amp; queue[j] j++; f 2l{^E#h
if (queue[k]>queue[j]) file://不用交换 G@j0rnn>B
break; hlt[\LP=$
SortUtil.swap(queue,j,k); [$[:"N_
k = j; *hcYGLx r
} cu+FM
} [z7bixN
private void fixUp(int k) { ID/F
while (k > 1) { HV<Lf 6gE
int j = k >> 1; 1'?4m0W1
if (queue[j]>queue[k]) R:B^
break; _UuC,Pl3
SortUtil.swap(queue,j,k); `-LGU7~+
k = j; (Cqn6dWK
} :%IoME
} irjP>3_e
m#=z7.XrX
} $ `7^+8vHV
7 [0L9\xm
} sJNFFOz
$ MC)}l
SortUtil： 5atYOep
)p*}e8L
package org.rut.util.algorithm; .1LCXW=
$8BPlqBIZ
import org.rut.util.algorithm.support.BubbleSort; i~r l o^
import org.rut.util.algorithm.support.HeapSort; z;y:9l
import org.rut.util.algorithm.support.ImprovedMergeSort; 3po:xMY
import org.rut.util.algorithm.support.ImprovedQuickSort; IsR!'%Pu
import org.rut.util.algorithm.support.InsertSort; 5eWwgA
import org.rut.util.algorithm.support.MergeSort; }l=xiAF
import org.rut.util.algorithm.support.QuickSort; XC+A_"w)
import org.rut.util.algorithm.support.SelectionSort; S{3nM<
import org.rut.util.algorithm.support.ShellSort; JfPD}w
-IV]U*4
/** ++E3]X|
* @author treeroot Z@r.pRr'
* @since 2006-2-2 6^DR0sO
* @version 1.0 $q 2D+_
*/ q:g2Zc'Y~W
public class SortUtil { M9f35 :
public final static int INSERT = 1; 0iJue&
public final static int BUBBLE = 2; |ZQ@fmvL/p
public final static int SELECTION = 3; aM;W$1h
public final static int SHELL = 4; ]LM-@G+Jz
public final static int QUICK = 5; 7x<i :x3
public final static int IMPROVED_QUICK = 6; jRatm.N
public final static int MERGE = 7; LW(6$hpPp
public final static int IMPROVED_MERGE = 8; bcupo:N
public final static int HEAP = 9; n93=8;&
9YBv|A
public static void sort(int[] data) { TjG4`:*y#m
sort(data, IMPROVED_QUICK); aFLO{tr`
} HJY2#lSha6
private static String[] name={ CJhL)0Cs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3)RsLI9
}; vY_-Ranj#.
[pM V?a[
private static Sort[] impl=new Sort[]{ a`0=AQ
new InsertSort(), KI+VXH}Y5{
new BubbleSort(), ,GgAsj: K
new SelectionSort(), MuSUKBhM
new ShellSort(), M %Qt|@O
new QuickSort(), E6WA}_
new ImprovedQuickSort(), x|vqNZ\F
new MergeSort(), Z:_D0jG
new ImprovedMergeSort(), BGfzslK
new HeapSort() y8DhOlewQ
}; ZIF49`Y4TF
12+>5BA
public static String toString(int algorithm){ <'g:T(t
return name[algorithm-1]; ?C/Te)
} JwXT%op9RP
`[n("7,
public static void sort(int[] data, int algorithm) { %$DI^yS
impl[algorithm-1].sort(data); +[tP_%/r'^
} uyY|v$FM
&@3H%DP}Ql
public static interface Sort { |p-t%xDdr
public void sort(int[] data); C/-63O_
} [VWUqlNt>
M4W5f#C5Ee
public static void swap(int[] data, int i, int j) { Rx+p.
int temp = data; tzh1s i
data = data[j]; [2Ud]l:6E
data[j] = temp; ;{[.Zu
} 9rA=pH%<>B
} 1u9LdkhnY