[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; 5[0l08'D
} `3H?*\<(
int i1=l; *&~sr
int i2=mid+1; gb^UFD L
for(int cur=l;cur<=r;cur++){ 70I4-[/z[d
if(i1==mid+1) %t(, *;
data[cur]=temp[i2++]; k N uN4/
else if(i2>r) qugPs(uQ
data[cur]=temp[i1++]; -bIpmp?
else if(temp[i1] data[cur]=temp[i1++]; oC;l5v<
else ^[SbV^DOL
data[cur]=temp[i2++]; gw*yIZ@3)
} =!Baz&#}
} gGceK^#
1yY'hb,0
} QB oZCLv
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改进后的归并排序: a93d'ZE-X
4%Z\G@0<'
package org.rut.util.algorithm.support; P,+0
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import org.rut.util.algorithm.SortUtil; O=9VX
p>w~T#17
/** \5v=pDd4g
* @author treeroot cfQh
* @since 2006-2-2 }r\SP3
* @version 1.0 \3@2rW"5
*/ Z{|.xgsY
public class ImprovedMergeSort implements SortUtil.Sort { 1f bFNxo8M
~]D\&D9=?
private static final int THRESHOLD = 10; #RZJ1uL
Vtc)/OH
/* *RqO3=
* (non-Javadoc) {{#a%O
* LU 5 `!0m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hBs>2u|z9
*/ EZa{C}NQ$2
public void sort(int[] data) { QL|:(QM
int[] temp=new int[data.length]; ?geWR_Z
mergeSort(data,temp,0,data.length-1); {?kKpMNNn
} :@z5& h
4jZi62
private void mergeSort(int[] data, int[] temp, int l, int r) { j)SgB7Q
int i, j, k; { <ao4w6B
int mid = (l + r) / 2; "ZK5P&d
if (l == r) *<h
return; <8xP-(wk;
if ((mid - l) >= THRESHOLD) McMK|_H
mergeSort(data, temp, l, mid); _<' kzOj
else Vzv.e6_
insertSort(data, l, mid - l + 1); }Rf:DmPE
if ((r - mid) > THRESHOLD) "Ee/q:`
mergeSort(data, temp, mid + 1, r); c`N`xU+z
else ]$`s}BN
insertSort(data, mid + 1, r - mid); {D_4~heF
7l|>
for (i = l; i <= mid; i++) { ~QQ23k&
temp = data; 1rzq$,O
} \t~u :D
for (j = 1; j <= r - mid; j++) { S0o,)`ZB
temp[r - j + 1] = data[j + mid]; \gk3w,B?E
} )v$Cv|"
int a = temp[l]; @|*Z0bn'
int b = temp[r]; e7j]BzGvl
for (i = l, j = r, k = l; k <= r; k++) { L)//- k9
if (a < b) { +#*z"a`
data[k] = temp[i++]; :J)lC =
a = temp; ,Elga}7u
} else { DF&jZ[##
data[k] = temp[j--]; dXcMysRc%&
b = temp[j]; N<i Vs
} 4Hd@U&E
} 7=ga_2
} >kLH6.
(nZ=9+j]d
/** uB)6\fkTB
* @param data .f!eRV.&
* @param l RU ,N_GV
* @param i 0?*I_[Y
*/ m^s2kB4A[
private void insertSort(int[] data, int start, int len) { -gX2{dW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); keq[6Lv
} f"=4,
} =)UiI3xHk
} XU })3]/
} :DF4g=
YKS'#F2
堆排序： $Q7E#
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package org.rut.util.algorithm.support; D;8V{Hs
_ JJ0pc9t
import org.rut.util.algorithm.SortUtil; an5kR_=
TD=/C|
/** ;s/b_RN
* @author treeroot BU?MRcHC
* @since 2006-2-2 U;A5-|C
* @version 1.0 {q>4:lsS
*/ )A+j
public class HeapSort implements SortUtil.Sort{ s^X/ Om
DlkKQ
/* (non-Javadoc) !'t2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pnw4QQ9
*/ S^"e5n2
public void sort(int[] data) { z00:59M4
MaxHeap h=new MaxHeap(); {%k;V ~
h.init(data); /!uBk3x:
for(int i=0;i h.remove(); 5dEO_1q %
System.arraycopy(h.queue,1,data,0,data.length); (tz]!Aa{s
} $YQ&\[pDA
O]LuL&=s y
private static class MaxHeap{ S<9d^= a
l@F e(^5E
void init(int[] data){ umrI4.1c
this.queue=new int[data.length+1]; 2o5<nGn
for(int i=0;i queue[++size]=data; ?4?jG3p
fixUp(size); Mz.&d:
} fJlN'F7
} )Ua2x@j'C@
z4+6k-#):
private int size=0; p00Bgo
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private int[] queue; M!XFb
_SW a3O#'
public int get() { zLK ~i>aW
return queue[1]; D>^ix[:J
} Sqt"G6<
3E@&wpj
public void remove() { 3Qr!?=nf
SortUtil.swap(queue,1,size--); <%f%e4 [
fixDown(1); &Gwh<%=U
} l"!;Vkg.5
file://fixdown <RsKV$Je I
private void fixDown(int k) { Kd1\D!#!6
int j; %,q#f#
while ((j = k << 1) <= size) { Cx'=2Y7
if (j < size %26amp;%26amp; queue[j] j++; IL"#TKKv
if (queue[k]>queue[j]) file://不用交换 gUtbCqDS
break; > V}NG
SortUtil.swap(queue,j,k); pr89zkYw
k = j; "?.Wb L
} 5|t&qUV
} m Dq,,
private void fixUp(int k) { p6\9HG
while (k > 1) { li XD2N
int j = k >> 1; *4VP5]!
if (queue[j]>queue[k]) sjkl? _
break; g*AqFY7|
SortUtil.swap(queue,j,k); :6iq{XV^
k = j; &4iIzw`
} phSP+/w
} _)" 5 gv
4/vQ=t
} bxHk0w
xT>V;aa\
} %6:2cR
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SortUtil： eajL[W^>
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package org.rut.util.algorithm; >n\Q[W
TI&J>/z;$
import org.rut.util.algorithm.support.BubbleSort; e%>E| 9*u
import org.rut.util.algorithm.support.HeapSort; rt;>pQ9,
import org.rut.util.algorithm.support.ImprovedMergeSort; 0zNS;wvv&
import org.rut.util.algorithm.support.ImprovedQuickSort; 4Lb<#e13R?
import org.rut.util.algorithm.support.InsertSort; >R-$JrU.=
import org.rut.util.algorithm.support.MergeSort; t!N>0]:mo
import org.rut.util.algorithm.support.QuickSort; 39eoL;O_
import org.rut.util.algorithm.support.SelectionSort; M$A!
import org.rut.util.algorithm.support.ShellSort; |(g2fByDf
u%'22q$
/** '|r!yAO6
* @author treeroot ']Y:gmM"
* @since 2006-2-2 UG$i5PV%i
* @version 1.0 xGPv3TLH^
*/ Wd<}|?R
public class SortUtil { }N!8i'suz9
public final static int INSERT = 1; @L7rE)AU.
public final static int BUBBLE = 2; *E6 p=
public final static int SELECTION = 3; Bqj*{m
public final static int SHELL = 4; G;+0V0K
public final static int QUICK = 5; $a1.c;NE'
public final static int IMPROVED_QUICK = 6; @#">~P|Hp
public final static int MERGE = 7; ?2c:|FD
public final static int IMPROVED_MERGE = 8; $5O&[/L
public final static int HEAP = 9; >8- `
>cLZP#^\2E
public static void sort(int[] data) { Y?x3JU0_
sort(data, IMPROVED_QUICK); 7T78S&g
} ^2tCDm5
private static String[] name={ ]~,'[gWb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n$iz
}; ;pq4El_
v\u+=}rl
private static Sort[] impl=new Sort[]{ 07&S^ X^/
new InsertSort(), Pr'py
new BubbleSort(), 35et+9
new SelectionSort(), 5#tvc4+)
new ShellSort(), C5FtJquGN)
new QuickSort(), c-{]H8$v
new ImprovedQuickSort(), ymu#u
new MergeSort(), p};<l@
new ImprovedMergeSort(), W'yICt(#G
new HeapSort() Fx2&ji6u
}; 3f x!\
IYPI5qCR
public static String toString(int algorithm){ 'UCL?$
return name[algorithm-1]; dXQWT@$y!E
} >d|W>|8e
K+H82$ #
public static void sort(int[] data, int algorithm) { &40dJ~SQ
impl[algorithm-1].sort(data); lU3wIB
} u5,<.#EVY
JM0)x}]+
public static interface Sort { &3MHe$
public void sort(int[] data); f.WtD`Oas
} p+Xz9A"
pK%'S
public static void swap(int[] data, int i, int j) { ! >V1zk
int temp = data; NaIVKo
data = data[j]; na>B{6
data[j] = temp; YjT #^AH
} |RdSrVB
} 2*N# %ZUX