[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; 2O*(F>>dT
} xlhc`wdm
int i1=l; tB,1+I=
int i2=mid+1; t%B ,ATW
for(int cur=l;cur<=r;cur++){ yv2&K=rZp
if(i1==mid+1) =9LeFrz
data[cur]=temp[i2++]; & rsNB:!
else if(i2>r) 2V-zmyJs5
data[cur]=temp[i1++]; zG[GyyAQ
else if(temp[i1] data[cur]=temp[i1++]; L_k'r\L
else `.0WK
data[cur]=temp[i2++]; Em(&cra
} >f !
} |q( .j4[i
7,pn0,HI
} 0_A|K>7
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改进后的归并排序: nc0!ag
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package org.rut.util.algorithm.support; jTDaW8@L
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import org.rut.util.algorithm.SortUtil; szDd!(&pv
L{2KK]IF
/** 3T<aGW1
* @author treeroot RV&=B%w+
* @since 2006-2-2 $_u9Y!
* @version 1.0 N'!:
*/ O.9r'n4f
public class ImprovedMergeSort implements SortUtil.Sort { S<-e/`p=H
figCeJ!W4
private static final int THRESHOLD = 10; q@"0(Oj
Bq20U:f
/* a$~pAy5C
* (non-Javadoc) Z0(}doh
* Hxw 7Q?F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8 <~E;:
*/ LH"CIL2
public void sort(int[] data) { &'0|U{|
int[] temp=new int[data.length]; d/m.VnW
mergeSort(data,temp,0,data.length-1); AWXBk+
} aj$#8l |zu
'5*8'.4Sy
private void mergeSort(int[] data, int[] temp, int l, int r) { Q&X#(3&'
int i, j, k; ;(Xig$k
int mid = (l + r) / 2; hm&cRehU
if (l == r) sK&[sN33
return; 5*n3*rbU:
if ((mid - l) >= THRESHOLD) o\M
mergeSort(data, temp, l, mid); -9f> rH\3
else I'qIc?
insertSort(data, l, mid - l + 1); j3J\%7^i
if ((r - mid) > THRESHOLD) ;;3oWsil}
mergeSort(data, temp, mid + 1, r); @_+B'<2
else )6k([u%;B
insertSort(data, mid + 1, r - mid); Ag6^>xb^
E&wz0d;gf
for (i = l; i <= mid; i++) { ^J[r<Dm8F
temp = data; {cW%i:
} v Mi&0$
for (j = 1; j <= r - mid; j++) { w<0F-0:8
temp[r - j + 1] = data[j + mid]; Avc9W[4
} \'BA}v &/
int a = temp[l]; "SV#e4C.
int b = temp[r]; zFq8xw
for (i = l, j = r, k = l; k <= r; k++) { Hl3%+f
if (a < b) { B9&$sTAB
data[k] = temp[i++]; q0>@!1Wb
a = temp; P>i!f!o*I
} else { %#zqZ|q
data[k] = temp[j--]; D=0^"7K
b = temp[j]; -VO&#Mt5u
} ?_VoO
} soTmKqj E
} ^`MGlI}
3G;#QK-c
/** %+{[%?xh
* @param data N1vPY]8
* @param l ?KKu1~a_
* @param i "s!|8F6$
*/ m! 3e>cI
private void insertSort(int[] data, int start, int len) { iz0GL&<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S=N3qBH6
} -fB;pS,
} DC-tBbQkk
} 'Pm.b}p<
} KcK,%!>B
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堆排序： o-f;$]yp>
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package org.rut.util.algorithm.support; |k:ecw
bRhc8#kw)
import org.rut.util.algorithm.SortUtil; T"tR*2HwSd
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/** [PI!.9H
* @author treeroot /4!.G#DLQ
* @since 2006-2-2 +IM:jrT(
* @version 1.0 ]m(C}}
*/ CHojF+e
public class HeapSort implements SortUtil.Sort{ eL`}j9
'T7=.Hq<4
/* (non-Javadoc) [ljC S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,?k~>,{3
*/ 0<n*8t?A-
public void sort(int[] data) { z87_/(nu
MaxHeap h=new MaxHeap(); u51%~
h.init(data); `/4R$E{
for(int i=0;i h.remove(); DA(ur'D
System.arraycopy(h.queue,1,data,0,data.length); NO%x 2dx0
} \mIm}+!H
L6ifT`;T
private static class MaxHeap{ ~:ldGfb|
*>#mI/#}
void init(int[] data){ T0Kjnzs
this.queue=new int[data.length+1]; naHQeX;
for(int i=0;i queue[++size]=data; gl$Ks+od
fixUp(size); !/qQ:k-.
} &l0-0T>
} FB\lUO)U\c
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private int size=0; 0&@pD`K e
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private int[] queue; s;9>YV2at
,+Bp>=pvs
public int get() { w9W0j
return queue[1]; [l7 G9T}/[
} 0?0$6F
I/&uiC{l@
public void remove() { f0h^ULd
SortUtil.swap(queue,1,size--); Ol@ssm
fixDown(1); 0]._|Ubn6)
} 9eh9@~mU"l
file://fixdown ?cH,!2
private void fixDown(int k) { t'.oty=
int j; z/Kjz$l!
while ((j = k << 1) <= size) { L4x08 e
if (j < size %26amp;%26amp; queue[j] j++; dZ"B6L!^(
if (queue[k]>queue[j]) file://不用交换 nB+UxU@
break; p# 4@
SortUtil.swap(queue,j,k); qVidubsW
k = j; 9wB}EDZ
} rZt7C(FM$7
} -{=c T?"+
private void fixUp(int k) { @8jc|X<A
while (k > 1) { 2=[deQs
int j = k >> 1; ="<S1}.
if (queue[j]>queue[k]) $X;wj5oj
break; &|%F=/VU
SortUtil.swap(queue,j,k); j0eGg::
k = j; rRK^vfoJ`
} v6$ }saTX
} OfAh?^R
d ~`_;.z
} rF*L@HI
KVC$o+<'`%
} |rhCQ"H
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SortUtil： F\H^=P
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package org.rut.util.algorithm; { yvKUTq`
#dKHU@+U"
import org.rut.util.algorithm.support.BubbleSort; yOQEF\
import org.rut.util.algorithm.support.HeapSort; \dG#hH4ZD
import org.rut.util.algorithm.support.ImprovedMergeSort; @[vwqPOL
import org.rut.util.algorithm.support.ImprovedQuickSort; VZRM=;V
import org.rut.util.algorithm.support.InsertSort; O6Gg?j
import org.rut.util.algorithm.support.MergeSort; !K~L&.\T
import org.rut.util.algorithm.support.QuickSort; j_I
import org.rut.util.algorithm.support.SelectionSort; 4NN81~v 4
import org.rut.util.algorithm.support.ShellSort; \kQ@G
4YmN3i
/** R DAihq
* @author treeroot `"#0\Wh
* @since 2006-2-2 cfg_xrW0^
* @version 1.0 w{HDCPuS
*/ ~nSGN%
public class SortUtil { j. m(Z}
public final static int INSERT = 1; , id`=L=
public final static int BUBBLE = 2; \!_:<"nX.
public final static int SELECTION = 3; Hh<3k- *d
public final static int SHELL = 4; vA(')"DDT
public final static int QUICK = 5; kV mJG#
public final static int IMPROVED_QUICK = 6; Z\)emps
public final static int MERGE = 7; jxt^d
public final static int IMPROVED_MERGE = 8; VHUOI64*
public final static int HEAP = 9; 2S{IZ]
sXmZ0Dv
public static void sort(int[] data) { x,3oa_'E
sort(data, IMPROVED_QUICK); Ijs"KAW ?
} u3Jsu=Nx-
private static String[] name={ +TR#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yQ3*~d~U|L
}; ;?A?1q8*
>UQ`@GdafR
private static Sort[] impl=new Sort[]{ KioD/
new InsertSort(), ZYBK'&J4m
new BubbleSort(), ?pLKUAh
new SelectionSort(), P!Mz5QZ+
new ShellSort(), G#~6a%VW
new QuickSort(), ic+tn9f\
new ImprovedQuickSort(), j1LL[+G-"_
new MergeSort(), "* Qwaq_
new ImprovedMergeSort(), v8<MAq
new HeapSort() FsbX{
}; NyJ=^=F#
nKoc%TNqe
public static String toString(int algorithm){ d_5wMK6O6
return name[algorithm-1]; -bq\2Yc$]
} ke(LjRS
X[XSf=
public static void sort(int[] data, int algorithm) { g[W`4
impl[algorithm-1].sort(data); &;)6G1X1
} W9$mgs=S`E
wkp|V{k
public static interface Sort { hgz7dF
public void sort(int[] data); <^Hh5kfS'
} >#MGGCGL
n,Z B-"dW
public static void swap(int[] data, int i, int j) { (:p&[HNuN
int temp = data; P9wx`x""k
data = data[j]; +bj[.
data[j] = temp; 8")1,
} ^<@9ph
} jx=2^A/i2-