[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; *rXESw]BR
} ?76Wg::
int i1=l; 0gL]^_+7
int i2=mid+1; x$[<<@F%
for(int cur=l;cur<=r;cur++){ T\{ on[O
if(i1==mid+1) 7*r Q6rAP
data[cur]=temp[i2++]; 3qXOsa7
else if(i2>r) <_dyUiT$J
data[cur]=temp[i1++]; `kpX}cKK}
else if(temp[i1] data[cur]=temp[i1++]; X2}\i5{
else hJ (Q^Z
data[cur]=temp[i2++]; 1j`-lD
} Q&opnvN
} lQ<2Vw#Yl
{Uz@`QO3
} k?;A#L~
JN .\{ Y
改进后的归并排序: +?w 7Nm`
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package org.rut.util.algorithm.support; m$ )yd~
(CJiCtAsl`
import org.rut.util.algorithm.SortUtil; X};m\Bz
r/$+'~apTk
/** c*-8h{}
* @author treeroot pEuZsQ
* @since 2006-2-2 D^baXp8
* @version 1.0 J}c57$Z
*/ wZJpSkcEx
public class ImprovedMergeSort implements SortUtil.Sort { ug'I:#@2
XZEawJ0
private static final int THRESHOLD = 10; IEfzu L<v
2?u>A3^R
/* x1:+M]Da
* (non-Javadoc) (v6tE[4
* =Mzg={)v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cv=nGFx6
*/ Uq5wN05
public void sort(int[] data) { `KqMcAW
int[] temp=new int[data.length]; vIF=kKl9,
mergeSort(data,temp,0,data.length-1); Sf);j0G,D
} )@09Y_9r
L(\sO=t
private void mergeSort(int[] data, int[] temp, int l, int r) { x#-uf
int i, j, k; UCj4%y6t
int mid = (l + r) / 2; ([R}s/)$
if (l == r) 1+~JGY#
return; }S<2({GI
if ((mid - l) >= THRESHOLD) ,d(F|5M:
mergeSort(data, temp, l, mid); D9zw' RY
else )xX(Et6+`
insertSort(data, l, mid - l + 1); ~=h]r/b< U
if ((r - mid) > THRESHOLD) '%_1eaH
mergeSort(data, temp, mid + 1, r); ` wuA}v3!
else QWH1xId
insertSort(data, mid + 1, r - mid); {_0Efc=7
IMIZ#/
for (i = l; i <= mid; i++) { (Z"QHfO'
temp = data; A%>Ir`I
} e4p:Zb:
for (j = 1; j <= r - mid; j++) { h#'(i<5v
temp[r - j + 1] = data[j + mid]; +6|Ys
} b Gq0k&
int a = temp[l]; @=,2{JF*6
int b = temp[r]; )f1<-a"D|
for (i = l, j = r, k = l; k <= r; k++) { %^n9Z/I
if (a < b) { *vc=>AEc
data[k] = temp[i++]; * t6XU
a = temp; 8ar2N)59
} else { .F:qJ6E
data[k] = temp[j--]; b#bdz1@s
b = temp[j]; 1@q~(1-o
} vCyvy^s-I
} #DApdD9M
} #P.jlpZk
py`RH)
/** F(>']D9$.
* @param data ePdM9%
* @param l F@Y)yi?z
* @param i W6ZXb_X
*/ -fw0bL%0
private void insertSort(int[] data, int start, int len) { h>-JXuN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4d4le
} OSk:njyC[
} mA}-hR%
} 'bGL@H
} O( G|fs
V#.;OtF]
堆排序： 'c<vj jIg
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package org.rut.util.algorithm.support; _+g5;S5
JYL/p9K[I
import org.rut.util.algorithm.SortUtil; n)uvN
I'2:>44>I6
/** =A={Dpv[>
* @author treeroot C`+g:qT
* @since 2006-2-2 9PjL 4A
* @version 1.0 `<kHNcm
*/ WJ=DTON
public class HeapSort implements SortUtil.Sort{ &I:[ 'l!
/tl/%:U*.
/* (non-Javadoc) 1RM;"b/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vA@Kb3,
*/ _/bFt6
public void sort(int[] data) { ^0"NcOzzxl
MaxHeap h=new MaxHeap(); JW9^C
h.init(data); 4)BZ%1+
for(int i=0;i h.remove(); bhe~ekb
System.arraycopy(h.queue,1,data,0,data.length); D.Rk{0se8
} .NcoST9a
jIJVl \i]
private static class MaxHeap{ 4v9zFJ<Z
Cbm
void init(int[] data){ 9)0AwLlv
this.queue=new int[data.length+1]; : Q X~bq
for(int i=0;i queue[++size]=data; `fh^[Q|4n0
fixUp(size); -QjdL9\[c7
} J_YbeZ]
} 7)$U>|=
";}Lf1M9
private int size=0; Vd3'dq8/?
l%\3'N]
private int[] queue; s (|T@g
*@o@>
public int get() { !R;P"%PHV
return queue[1]; B!GpD@U
} t+Kxww58
i3t=4[~oL
public void remove() { Cnd70tbD )
SortUtil.swap(queue,1,size--); $V-]DD%Y
fixDown(1); T:o!H Xdj^
} ,{:c<W:A]
file://fixdown kv&%$cA
private void fixDown(int k) { ?g|K"P<1
int j; IK5FSN]s/
while ((j = k << 1) <= size) { 5w"f.d'
if (j < size %26amp;%26amp; queue[j] j++; jUtrFl
if (queue[k]>queue[j]) file://不用交换 9|WBJ6
break; 6g4CUP'Y
SortUtil.swap(queue,j,k); 0i\ol9,bf
k = j; A]R7H1
} &;L4Cj$q
} ##d\|r
private void fixUp(int k) { 3lH#+@
while (k > 1) { iz]Vb{5n%
int j = k >> 1; fl _k5Q'&p
if (queue[j]>queue[k]) o^dt# &
break; b9ysxuUdS
SortUtil.swap(queue,j,k); zrk/}b0j
k = j; 3GqJs
} HX\@Qws
} {:m5<6?x)
& tQHxiDX
} IrQ8t!
z"o;|T:
} Nge_ Ks
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SortUtil： YM{Q)115
W> .O"Ri
package org.rut.util.algorithm; d='z^vHK
(bt^L3}a
import org.rut.util.algorithm.support.BubbleSort; G&:[G>iSm^
import org.rut.util.algorithm.support.HeapSort; ac>}$Uw)
import org.rut.util.algorithm.support.ImprovedMergeSort; hRb k-b
import org.rut.util.algorithm.support.ImprovedQuickSort; C&D]!ZvF
import org.rut.util.algorithm.support.InsertSort; ]Vhhx`0
import org.rut.util.algorithm.support.MergeSort; wOE_2k
import org.rut.util.algorithm.support.QuickSort; A>+5~u
import org.rut.util.algorithm.support.SelectionSort; S<Q8kW:
import org.rut.util.algorithm.support.ShellSort; Uy^Hh4|
}#zE`IT
/** K4SR`Q
* @author treeroot Lv,~Mf1|
* @since 2006-2-2 PN/2EmwtC
* @version 1.0 I@cKiB
*/ *{W5QEa
public class SortUtil { w3Aq[1U0
public final static int INSERT = 1; a$#,'UB
public final static int BUBBLE = 2; ( f8g}2
public final static int SELECTION = 3; X^%I 3
public final static int SHELL = 4; q9pBS1Ej
public final static int QUICK = 5; Zm%}AzM
public final static int IMPROVED_QUICK = 6; Fdd$Bl.&XS
public final static int MERGE = 7; <9-tA\`8N
public final static int IMPROVED_MERGE = 8; V5KAiG<d
public final static int HEAP = 9; . )Fn]x"<
y[qW>
public static void sort(int[] data) { H;*:XLPF
sort(data, IMPROVED_QUICK); %xxe U
} HG@!J>YaD
private static String[] name={ ig; ~ T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `h$6MFC/g
}; 8v1asFxs.
.)|jBC8|}
private static Sort[] impl=new Sort[]{ ~FZLA}
new InsertSort(), z-[Jbjhd
new BubbleSort(), @`}'P115@
new SelectionSort(), {xEX_$nv
new ShellSort(), wX#\\Jgi
new QuickSort(), #Vul#JHW
new ImprovedQuickSort(), #.9Xkn9S
new MergeSort(), dp)lHBV
new ImprovedMergeSort(), SZG8@ !_}7
new HeapSort() TuIeaH%x
}; 8i-?\VZD
a9QaFs"
public static String toString(int algorithm){ @pytHN8( $
return name[algorithm-1]; i+(`"8W
} 'ZT!a]4
zF)_t S
public static void sort(int[] data, int algorithm) { m>:%[vm
impl[algorithm-1].sort(data); ddnWr"_
} }C"#b\A2
Y141Twjvd
public static interface Sort { 54uTu2
public void sort(int[] data); 5*g@;aR1
} e-qr d
8H;TPa
public static void swap(int[] data, int i, int j) { D:n0dfPU
int temp = data; OFRzzG@
data = data[j]; ;i:Uoyi
data[j] = temp; Crpkq/M
} DVTzN(gO*~
} W:rzfO.`Z