[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; ,O"zz7
} 6rzXM`cs
int i1=l; J$i5A9IUr
int i2=mid+1; I=yy I
for(int cur=l;cur<=r;cur++){ z4c{W~}`
if(i1==mid+1) nrI-F,1
data[cur]=temp[i2++]; vC!}%sxVw_
else if(i2>r) 'd=B{7k@
data[cur]=temp[i1++]; rc]`PV
else if(temp[i1] data[cur]=temp[i1++]; .^* .-8q
else OLxiY r
data[cur]=temp[i2++]; Z&0*\.6S~
} I)X33X,
} ^0&
Ea[K$NC)#
} o8ADAU"
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改进后的归并排序: M&K'5G)7
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package org.rut.util.algorithm.support; 5J8U] :Y)
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import org.rut.util.algorithm.SortUtil; D[ (A`!)
;3WVrYe
/** 6N'v`p8
* @author treeroot N!:&Xz
* @since 2006-2-2 |\/Y<_)JD
* @version 1.0 (y!<^Q
*/ F2RU7o'f.
public class ImprovedMergeSort implements SortUtil.Sort { :Sd iG=t
?Dk&5d^d
private static final int THRESHOLD = 10; u>o2lvy8
Mk@%Wuxg2
/* E"$AOM?(*i
* (non-Javadoc) 7LY4q/
* \"@BZ.y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v9s/!<j
*/ 7ClN-/4
public void sort(int[] data) { BiUbg6T.G
int[] temp=new int[data.length]; @'{m-?*
mergeSort(data,temp,0,data.length-1); q}mQm'
} U(cV#@Y
Ks@
private void mergeSort(int[] data, int[] temp, int l, int r) { 8n^v,s>
int i, j, k; w{;esU
int mid = (l + r) / 2; nv^nq]4'Dq
if (l == r) yb:Xjg7
return; B'Ll\<mq@
if ((mid - l) >= THRESHOLD) &}G2;O}3
mergeSort(data, temp, l, mid); J}cqBk>
else |+Fko8-
insertSort(data, l, mid - l + 1); Cj x(Z]
if ((r - mid) > THRESHOLD) w(KB=lA2
mergeSort(data, temp, mid + 1, r); BHh%3Q
else jNa'l<dn]
insertSort(data, mid + 1, r - mid); @] `_+\y
9,`eYAu
for (i = l; i <= mid; i++) { 'X$2gD3c9
temp = data; g~JN"ap
} %4~2
for (j = 1; j <= r - mid; j++) { -mlBr63Bj
temp[r - j + 1] = data[j + mid]; Oi=c 6n
} Hki
int a = temp[l]; & A%*sD6
int b = temp[r]; P=%'2BQ{{
for (i = l, j = r, k = l; k <= r; k++) { b+.P4+
if (a < b) { tz&oe
data[k] = temp[i++]; S0 AaJty
a = temp; uIkB&
} else { w{1DwCLKq
data[k] = temp[j--]; MwN.Ll
b = temp[j]; B~oc.sg
} 1\_S1ZS
} 5P'<X p
} ~a^"VQ5]ac
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/** "Y Z B@
* @param data WZa?Xb
* @param l &cEQ6('H
* @param i wua`e <"
*/ dd +%d
private void insertSort(int[] data, int start, int len) { 1 U|IN=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k%5o5Hx
} O.%' 47A
} `czL$tN<P
} cZ{-h
} M}]E,[
4#oLf1
堆排序： B=mk@gX,G
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package org.rut.util.algorithm.support; n-P)X<\
#G;0yB:76
import org.rut.util.algorithm.SortUtil; J1Ay^*qRU
?n 9<PMo
/** yaiw|j`A
* @author treeroot j`GL#J[wqQ
* @since 2006-2-2 t<Iy`r71
* @version 1.0 F|t3%dpj
*/ }6;v`1Hr
public class HeapSort implements SortUtil.Sort{ Z9MT, "
f,ajo
/* (non-Javadoc) l cHqg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Gc#D:zU
*/ ,,hW|CmN30
public void sort(int[] data) { dVh* a
MaxHeap h=new MaxHeap(); h7iI=[_V
h.init(data); %. =B=*
for(int i=0;i h.remove(); Gm0&y
System.arraycopy(h.queue,1,data,0,data.length); M PhG:^g
} ,U\F<$O
%z}{jqD&:X
private static class MaxHeap{ ai!zb2j!E
@pcmVsIp
void init(int[] data){ U8+5{,$\.
this.queue=new int[data.length+1]; qHT_,\l2
for(int i=0;i queue[++size]=data; Q:6i 3 Nr/
fixUp(size); aXAV`%b
} 'rZYl Qm
} kf3 u',}R
BB&7VSgc-
private int size=0; <<,YgRl2
95 7Cr
private int[] queue; +}eGCZra
rq;Xcc
public int get() { &R? \q*
return queue[1]; oDtgBO<
} !Nu ~4
Z%]s+V)st
public void remove() { \OV><|Lkh
SortUtil.swap(queue,1,size--); sYQ=nL
fixDown(1); .DzFtc
} v##k,R.d
file://fixdown $IZ02ZM$
private void fixDown(int k) { PyOj{WX>W
int j; E;Akm':
while ((j = k << 1) <= size) { zGfF.q}
if (j < size %26amp;%26amp; queue[j] j++; ^W&qTSjh
if (queue[k]>queue[j]) file://不用交换 9~ [Sio~
break; v1s.j2T
SortUtil.swap(queue,j,k); 5%+M:B
k = j; sp=;i8Y 3
} C5q n(tv
} o5NV4=
private void fixUp(int k) { f-lM[\ma_
while (k > 1) { IYIlab\TZ
int j = k >> 1; 1{TmK9U
if (queue[j]>queue[k]) =0Z^q0.
break; FaNr}$Pe
SortUtil.swap(queue,j,k); >l<`)4*H
k = j; op\'T;xIu
} 3#O Rfr(
} m&o6j>C
xc4g`Xi
} _$g2;X >
(!^i6z0Sp
} E}7@?o7u}
N- !>\n
SortUtil： v}vwk8
n};:*N! v
package org.rut.util.algorithm; 7Nu.2qE
TuF;>{~}
import org.rut.util.algorithm.support.BubbleSort; ,".1![b
import org.rut.util.algorithm.support.HeapSort; qL;OE.?oA
import org.rut.util.algorithm.support.ImprovedMergeSort; P2U^%_~
import org.rut.util.algorithm.support.ImprovedQuickSort; `7v"(
import org.rut.util.algorithm.support.InsertSort; >(>,*zP<9
import org.rut.util.algorithm.support.MergeSort; 3sh}(
import org.rut.util.algorithm.support.QuickSort; [{}Hk%wlX
import org.rut.util.algorithm.support.SelectionSort; FX"j8i/N
import org.rut.util.algorithm.support.ShellSort; V7+fNr]I
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/** ~pv|
* @author treeroot %T~3xQ
* @since 2006-2-2 MBeubS
* @version 1.0 Wu}84W"!.V
*/ 16J"QUuG
public class SortUtil { ><t4 f(d
public final static int INSERT = 1; 8>\tD
public final static int BUBBLE = 2; J@CKgE
public final static int SELECTION = 3; A_:CGtv:
public final static int SHELL = 4; Mm&#I[:
public final static int QUICK = 5; ECZ`I Z.
public final static int IMPROVED_QUICK = 6; $N;Nvp2
public final static int MERGE = 7; <$"
public final static int IMPROVED_MERGE = 8; U]o
public final static int HEAP = 9; zJ"`40V*;
U=kPxe
public static void sort(int[] data) { e7n[NVrX
sort(data, IMPROVED_QUICK); <8 $fo
} r]sNI[
private static String[] name={ S.4gfY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DlMT<ld
}; | e?:Uq
^~ 95q0hq:
private static Sort[] impl=new Sort[]{ 5_H`6-q
new InsertSort(), _l{`lQ}
new BubbleSort(), *VuiEBG
new SelectionSort(), >/BMA;`
new ShellSort(), [w1 4hHnq
new QuickSort(), pXoD*o b
new ImprovedQuickSort(), ktA5]f;
new MergeSort(), x6qQ Y<>
new ImprovedMergeSort(), Whd\Ub8(
new HeapSort() u~]O #v
}; uK6'TJ
n'5LY9"
public static String toString(int algorithm){ ;2k!KW@
return name[algorithm-1]; o)V@|i0Js
} Z9)-kRQz=r
R^hlfKnt
public static void sort(int[] data, int algorithm) { ><&>JgM
impl[algorithm-1].sort(data); *eF'<._[U
} V_x8 Q+~?
3i*HwEh
public static interface Sort { c:d.mkF\
public void sort(int[] data); P]~apMi:
} `X8wnD
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public static void swap(int[] data, int i, int j) { qh]D=i
int temp = data; }xA Eu,n^
data = data[j]; 99KW("C1F
data[j] = temp; VUneCt%
} ITt*TuS2c
} 1_=I\zx(