[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; .Rxz;-VA
} U]Q2EL\%
int i1=l; }./__gJ
int i2=mid+1; 6JBE=9d-Q
for(int cur=l;cur<=r;cur++){ :WejY`}H%
if(i1==mid+1) vsg"!y@v
data[cur]=temp[i2++]; *,!6#Z7
else if(i2>r) GYYk3\r
data[cur]=temp[i1++]; 'VCF{0{H~
else if(temp[i1] data[cur]=temp[i1++]; MnUal}MO
else zZDa71>
data[cur]=temp[i2++]; 8)3g!3S
} g9I2 e<;o
} j.X3SQb4G
RVtb0FL
} 09pnM|8A
7u-o7#,X2
改进后的归并排序: S{aK\>>H
9r!psRA:`)
package org.rut.util.algorithm.support; +4EQ9-
1i:l
import org.rut.util.algorithm.SortUtil; ^0ZabR'
W#E-vi+l
/** H\AJLk2E
* @author treeroot +s.r!?49+
* @since 2006-2-2 P#bZtWx'<N
* @version 1.0 r`}')2
*/ %JmSCjt`G
public class ImprovedMergeSort implements SortUtil.Sort { ;muxIr`?
Dsc{- <v
private static final int THRESHOLD = 10; N=lFf+
{j.5!Nj]B
/* z/(^E8F
* (non-Javadoc) V9f$zjpw
* eS9uKb5n(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^2}0lP|
*/ gtWJR
public void sort(int[] data) { IGEs1
int[] temp=new int[data.length]; v<N7o8
mergeSort(data,temp,0,data.length-1); chW 1UE
} k\X1`D}R
cLn&b}8'
private void mergeSort(int[] data, int[] temp, int l, int r) { -v#0.3zm
int i, j, k; h-<2N)>!
int mid = (l + r) / 2; ;HRIB)wF
if (l == r) O`R@6KG
return; 7<['4*u
if ((mid - l) >= THRESHOLD) @DG$
mergeSort(data, temp, l, mid); FB3C'!'<)
else S,,,D+4
insertSort(data, l, mid - l + 1); EEmYfP[3
if ((r - mid) > THRESHOLD) 0w}OE8uq
mergeSort(data, temp, mid + 1, r); gB,~Y511
else hOjy$Z
insertSort(data, mid + 1, r - mid); 3(l^{YC+[7
dUiv+K)ccQ
for (i = l; i <= mid; i++) { 3:1 h:Yc<
temp = data; R@Ch3l@
} 1 i # .h$
for (j = 1; j <= r - mid; j++) { ]Z%9l(
temp[r - j + 1] = data[j + mid]; L5 ~wX
} z)N8#Y~vn
int a = temp[l]; 9M{z@H/
int b = temp[r]; W=j
for (i = l, j = r, k = l; k <= r; k++) { 70IBE[T&
if (a < b) { 6'+;5M!
data[k] = temp[i++]; (F9U`1~4
a = temp; ,q$'hYTaJ
} else { S{_i1'
data[k] = temp[j--]; *mH++3h
b = temp[j]; `{BY {
} J_) .Hd
} R>1
} \=3V]7\&
Kppi N+||
/** M{:}.H<a
* @param data rbfP6t:c3
* @param l ^p3"_;p)h
* @param i e%_2n=p~)%
*/ stn/
private void insertSort(int[] data, int start, int len) { 8{QN$Qkn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VnqgN
} %dA6vHI,
} V80BO#Pk
} CHxu%-g
} -L=aZPW`M
M@\A_x(Mas
堆排序： 36ygI0V_
zF'LbQz0[
package org.rut.util.algorithm.support; (.Q.S[<Y
,ru2C_LQ
import org.rut.util.algorithm.SortUtil; _`'VOY`o
n."vCP}O+
/** )bCw~'h*
* @author treeroot 2Fwp\I;
* @since 2006-2-2 (t$jb|Oa
* @version 1.0 4KH8dau.fF
*/ ,+LX.f&/8!
public class HeapSort implements SortUtil.Sort{ 9eG{"0)
/K!&4mK
/* (non-Javadoc) :2+,?#W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }.+{M.[}
*/ v D"4aw
public void sort(int[] data) { \53(D7+
MaxHeap h=new MaxHeap(); 2VB|a;Mo
h.init(data); E]T>m!6
for(int i=0;i h.remove(); =~qQ?;on
System.arraycopy(h.queue,1,data,0,data.length); <]{$XcNm
} =rH' \7T
g"c|%3
private static class MaxHeap{ OAlV7cfD
kBF.TGT[l
void init(int[] data){ x}\_o< d
this.queue=new int[data.length+1]; TU-aL
for(int i=0;i queue[++size]=data; j` RuK
fixUp(size); D7v-+jypp
} )1E[CIaXK
} 3 VNPdXsh
h`{agWB
private int size=0; c4\Nuy
I%4)%
private int[] queue; cD&QN9
}MW7,F
public int get() { 8:D|[u;iG
return queue[1]; {nr}C4]o
} U;PGBoe
`lI(SS]w
public void remove() { q4Rvr[
SortUtil.swap(queue,1,size--); pv3SAO4
fixDown(1); \my5E\
} zc1y)s0G
file://fixdown -XuRQ_)nG
private void fixDown(int k) { utH/E7^8
int j; /"q wC
while ((j = k << 1) <= size) { ca@?-)
if (j < size %26amp;%26amp; queue[j] j++; ^/"[jq3F
if (queue[k]>queue[j]) file://不用交换 B\<;e
break; Un~ }M/
SortUtil.swap(queue,j,k); d9qA\ [
k = j; U3oMY{{EJ
} f!H~BMA+a
} v@qU<\Y>
private void fixUp(int k) { -gq,^j5,
while (k > 1) { -g5o+RT@
int j = k >> 1; 0Z11V9Jk
if (queue[j]>queue[k]) g`n5-D@3
break; xJNV^u
SortUtil.swap(queue,j,k); SJ ay
k = j; F4b$
} DI>SW%)>
} "ZHA.M]`
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} ,NA _pvH)
#?3oGrS Y
} X~o6Xkg
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SortUtil： GW;\3@o
l`mNOQ@}'
package org.rut.util.algorithm; }Dc7'GZ
Cih~cwE
import org.rut.util.algorithm.support.BubbleSort; B*AF8wX|
import org.rut.util.algorithm.support.HeapSort; >S[NI<=8S
import org.rut.util.algorithm.support.ImprovedMergeSort; '<!T'l:R:/
import org.rut.util.algorithm.support.ImprovedQuickSort; huTWoMU
import org.rut.util.algorithm.support.InsertSort; 0Q)m>oL.
import org.rut.util.algorithm.support.MergeSort; =}xH6^It
import org.rut.util.algorithm.support.QuickSort; 2t3DQ
import org.rut.util.algorithm.support.SelectionSort; a j13cC$
import org.rut.util.algorithm.support.ShellSort; %-Oo92tP
C4.g}q
/** <ZXK}5SZ#
* @author treeroot 8Rric[v
* @since 2006-2-2 `;v5o4.`
* @version 1.0 SMMvRF`7
*/ 8Ben}j)H
public class SortUtil { 1b LY1
public final static int INSERT = 1; Gi7p`F.
public final static int BUBBLE = 2; +hL%8CVU M
public final static int SELECTION = 3; c-".VF
public final static int SHELL = 4; g7g^iLU
public final static int QUICK = 5; Jr.4Y>;}e3
public final static int IMPROVED_QUICK = 6; gBPYGci2F
public final static int MERGE = 7; 0~GtK8^B
public final static int IMPROVED_MERGE = 8; 4cQ|"sOzD
public final static int HEAP = 9; }Q#3\z5
4lsg%b6_%,
public static void sort(int[] data) { E%np-is{1
sort(data, IMPROVED_QUICK); yRtxh_wr9
} tMOhH #
private static String[] name={ ]IeyJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k=``Avp?
}; :J~sz)n4
>og- jz
private static Sort[] impl=new Sort[]{ WJs2d73Qp
new InsertSort(), gzd)7np B2
new BubbleSort(), [~UCYYl
new SelectionSort(), J{qpGRQNa
new ShellSort(), aPH6R<G
new QuickSort(), *c{X\!YBh
new ImprovedQuickSort(), Lju)q6
new MergeSort(), uYy&<_r
new ImprovedMergeSort(), l/:23\
new HeapSort() TD6MP9L
}; 1_V',0|`>
"4[8pZO/
public static String toString(int algorithm){ XmI63W*
return name[algorithm-1]; PZE{-TM?W
} 'A)r)z{X
riz[AAB
public static void sort(int[] data, int algorithm) { ]s<}'&
impl[algorithm-1].sort(data); EN/e`S$)
} #24eogo~
9n!IdqKN
public static interface Sort { *r|)@K|
public void sort(int[] data); = k7}[!T
} t IO 'ky
dWDM{t\}\
public static void swap(int[] data, int i, int j) { WIkr0k
int temp = data; 9aKt (g6
data = data[j]; o{I]c#W
data[j] = temp; f'Cx%
} Jh!'"7
} X|wg7>kh*`