[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; Bz5-ITX
} o] mD"3_
int i1=l; 35tu>^_#V
int i2=mid+1; P-ri=E}>
for(int cur=l;cur<=r;cur++){ a33TPoj
if(i1==mid+1) K_K5'2dE
data[cur]=temp[i2++]; &3yD_P_3
else if(i2>r) i;!H!-sM
data[cur]=temp[i1++]; fu90]upz~
else if(temp[i1] data[cur]=temp[i1++]; 7O,U?p
else R'S0 zp6
data[cur]=temp[i2++]; x' .:&z
} ;vt8R=T
} <!pY$
C-iK$/U
} It{;SKeo
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改进后的归并排序: `[C!L *#,
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package org.rut.util.algorithm.support; {'U Rz[g
hUYd0qEbEt
import org.rut.util.algorithm.SortUtil; @-+Q# Zz`
Vb9',a?#n
/** Me=CSQqf<
* @author treeroot qu|B4?Y/CR
* @since 2006-2-2 =|9H
* @version 1.0 )n,P"0
*/ W^G>cC8.L
public class ImprovedMergeSort implements SortUtil.Sort { g&`pgmUX
K# Jk _"W
private static final int THRESHOLD = 10; F+@5C:<?
d9q(xZ5
/* _U/!4A
* (non-Javadoc) |O"lNUW
* 1bH;!J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \|K;-pL
*/ z`\F@pX%wC
public void sort(int[] data) { &B|D;|7H
int[] temp=new int[data.length]; mQY_`&Jq
mergeSort(data,temp,0,data.length-1); *W kIq>
} nB!&Zq
4n4?4BEn
private void mergeSort(int[] data, int[] temp, int l, int r) { '{(UW.Awo
int i, j, k; Z.M,NR
int mid = (l + r) / 2; 6,9o>zT%H
if (l == r) 3YZs+d.;ib
return; 5sb\r,kW
if ((mid - l) >= THRESHOLD) .B\5OI,]
mergeSort(data, temp, l, mid); U{VCZ*0cj
else TYQwy*
insertSort(data, l, mid - l + 1); AGbhJ=tB
if ((r - mid) > THRESHOLD) /"B?1?qc,=
mergeSort(data, temp, mid + 1, r); 4)("v-p
else S*n@81Z
insertSort(data, mid + 1, r - mid); ;v$4$D]L
Yboiwy,n
for (i = l; i <= mid; i++) { X@f "-\
temp = data; PnoPbk[<
} [h,QBz
for (j = 1; j <= r - mid; j++) { L>YU,I\o
temp[r - j + 1] = data[j + mid]; o0pII )v
} Iyyh!MVF
int a = temp[l]; d`F&aC
int b = temp[r]; BN4_:
for (i = l, j = r, k = l; k <= r; k++) { nG;8:f`
if (a < b) { =X.9,$Y
data[k] = temp[i++]; p8]68!=W\F
a = temp; B4mR9HMh
} else { Oj^,m.R
data[k] = temp[j--]; >2Kh0rIH
b = temp[j]; sx`O8t
} AqV7\gdOC
} TEaJG9RU>v
} 19j+lCSvH
GO^_=EMR[
/** =hMY2D
* @param data r}jGUe}d
* @param l o!!yd8~*r
* @param i R@`y>XGNJ
*/ J;f!!<l\
private void insertSort(int[] data, int start, int len) { ,.qMEMm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yfC^x%d7G
} 1Q.\s_2
} :=[XW?L%x
} }sOwp}FV8X
} }eRD|1
\} ^E`b
堆排序： f`&dQ,;
YR;^hs?
package org.rut.util.algorithm.support; #Z<a
HVC>9_:]
import org.rut.util.algorithm.SortUtil; Z%n(O(^L
h@LHRMO
/** ]C:l,I
* @author treeroot T N!=@Gy
* @since 2006-2-2 HO''&hz
* @version 1.0 z$kenhFG/
*/ 37RLE1Yf
public class HeapSort implements SortUtil.Sort{ A4]s~Ur
DHY@akhrK
/* (non-Javadoc) ZPD[5)~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /mK?E5H'r1
*/ pm9%%M$
public void sort(int[] data) { uSR~@Lj ~
MaxHeap h=new MaxHeap(); jr3ti>,xV
h.init(data); Zw~+Pb
for(int i=0;i h.remove(); 59Gk3frk(
System.arraycopy(h.queue,1,data,0,data.length); s\P2Bp_{
} @_LN3zP
? mhs$g>
private static class MaxHeap{ %zOh
EKzAd
void init(int[] data){ i}~SDY
this.queue=new int[data.length+1]; DK oN}c
for(int i=0;i queue[++size]=data; t&(PN%icD
fixUp(size); fhCc! \
} c-Pw]Ju
} =2 *rA'im
]]"jw{W}A
private int size=0; > z^#
WsDM{1c
private int[] queue; p^pOuy8
#-GJ&m8
public int get() { N72Yq)(
return queue[1]; %G?;!Lz
} f +hjC
$*W6A/%O
public void remove() { _Um d
SortUtil.swap(queue,1,size--); X~xd/M=9^
fixDown(1); ,<Q~b%(3
} U`]T~9I
file://fixdown /By)"
private void fixDown(int k) { 9RWkm%?
int j; RO3oP1@B
while ((j = k << 1) <= size) { 1* ]Ev
if (j < size %26amp;%26amp; queue[j] j++; 8x[YZ@iM-
if (queue[k]>queue[j]) file://不用交换 OK{xuX8u
break; ehA;i.n
SortUtil.swap(queue,j,k); Gxax2o
k = j; u@3y&b
} _0 m\[t.
} d;+[i
private void fixUp(int k) { z~\t|Z]G,|
while (k > 1) { ~RD+.A
int j = k >> 1; YQ0)5}
if (queue[j]>queue[k]) &ciN@nJ|$z
break; p\Lq}tk<
SortUtil.swap(queue,j,k); [>|FB'
k = j; 2:LHy[{5
} T{}fHfM
} ]p!Gt,rYq
|D.O6?v@
} |0z;K:5s
7_# 1Ec|;
} -ti{6:H8
s[Ur~Wvn
SortUtil： \sA*V%n
&Z^l=YH,
package org.rut.util.algorithm; pZZf[p^s|
T%Pp*1/m7
import org.rut.util.algorithm.support.BubbleSort; 5TUNX^AW
import org.rut.util.algorithm.support.HeapSort; /1`cRyS
import org.rut.util.algorithm.support.ImprovedMergeSort; D?M!ra
import org.rut.util.algorithm.support.ImprovedQuickSort; ejXMKPE;
import org.rut.util.algorithm.support.InsertSort; wLV~F[:
import org.rut.util.algorithm.support.MergeSort; tMj1~ R
import org.rut.util.algorithm.support.QuickSort; Q# ?wXX47
import org.rut.util.algorithm.support.SelectionSort; !rhk $L
import org.rut.util.algorithm.support.ShellSort; *xR 2)u
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/** UMN*]_'+;b
* @author treeroot n,O5".aa<
* @since 2006-2-2 |3? 8)z\n
* @version 1.0 bqx0d=Z~[
*/ k8]O65t|
public class SortUtil { 4l8BQz}sb
public final static int INSERT = 1; Jg$xO@.
public final static int BUBBLE = 2; +{53a_q
public final static int SELECTION = 3; AD('=g J
public final static int SHELL = 4; ~]L}p
public final static int QUICK = 5; W0cgI9=9
public final static int IMPROVED_QUICK = 6; insY(.N
public final static int MERGE = 7; 9TxyZL
public final static int IMPROVED_MERGE = 8; [*m2
public final static int HEAP = 9; ~2_lp^Y
P|jF6?C
public static void sort(int[] data) { jQj,q{eA
sort(data, IMPROVED_QUICK); v$w++3H
} !Ngw\@f
private static String[] name={ y~<@x.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %1:chvS
}; ~=y3Gd B3
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private static Sort[] impl=new Sort[]{ 8rbG*6
new InsertSort(), +1;'B4
new BubbleSort(), @=uN\) 1
new SelectionSort(), w>~M}Ahj
new ShellSort(), RM*f|j
new QuickSort(), rU#li0 >
new ImprovedQuickSort(), 5@u~3jPd
new MergeSort(), _`a&9i &
new ImprovedMergeSort(), vH?9\3
new HeapSort() mgkyC5)d
}; I+,SZ]n
%(LvE}[RJ
public static String toString(int algorithm){ s\0Ko1
return name[algorithm-1]; E(L<L1:"
} F;D1F+S
=3ADT$YHd
public static void sort(int[] data, int algorithm) { BgRZ<B`
impl[algorithm-1].sort(data); M$&>5n7
} |pWaBh|r
V,LVB_6
public static interface Sort { QB1M3b
public void sort(int[] data); j Selop>N
} 5()Fvae{k
d\Jji 6W
public static void swap(int[] data, int i, int j) { |f NMs
int temp = data; FDLd&4Ex
data = data[j]; [b`6v`x
data[j] = temp; N8+P
} `fW{yb
} !A[S6-18%-