[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; yH0BNz8V
} 'X$2gD3c9
int i1=l; jKI0d+U
int i2=mid+1; n2$(MDdL`
for(int cur=l;cur<=r;cur++){ !!4` #Z0+#
if(i1==mid+1) gE>_:s
data[cur]=temp[i2++]; \.tnzP D
else if(i2>r) ir%?J&C+t
data[cur]=temp[i1++]; 2}P?N
else if(temp[i1] data[cur]=temp[i1++]; P<@V
else .6m%/-whS
data[cur]=temp[i2++]; G92Ya^`
} "Y Z B@
} W9ZfD~(3-
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} rG _T!']~
O.%' 47A
改进后的归并排序: '<.@a"DnJ
SW ^F
package org.rut.util.algorithm.support; JlZU31Xws
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import org.rut.util.algorithm.SortUtil; U=4tJb
Yz?4eSa/
/** Ydw04WEJ
* @author treeroot cg-\|H1
* @since 2006-2-2 =N5~iMorD-
* @version 1.0 l cHqg
*/ h <s.o#8
public class ImprovedMergeSort implements SortUtil.Sort { x4&<Vr
dy^Zlu` f
private static final int THRESHOLD = 10; #Ont1>T,G
9U[ A
/* T(UPWsj
* (non-Javadoc) e_Ue9c.}
* dD Qx[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'rZYl Qm
*/ k?%?EsR
public void sort(int[] data) { umt*;U=
int[] temp=new int[data.length]; <6_RWtU
mergeSort(data,temp,0,data.length-1); tnv @`xBn
} sYQ=nL
?pS,?>J f
private void mergeSort(int[] data, int[] temp, int l, int r) { noali96J
int i, j, k; \uT2)X( N
int mid = (l + r) / 2; 9~ [Sio~
if (l == r) N,Fmu
return; 8T&.8r
if ((mid - l) >= THRESHOLD) v{/z`J!JR
mergeSort(data, temp, l, mid); f~HC%C YH
else w}wABO
insertSort(data, l, mid - l + 1); IYIlab\TZ
if ((r - mid) > THRESHOLD) &!|'EW
mergeSort(data, temp, mid + 1, r); |\PI"rW
else op\'T;xIu
insertSort(data, mid + 1, r - mid); kj$Ks2!W
(#uz_/xXa
for (i = l; i <= mid; i++) { p$mx
temp = data; KaEL*
} :gD=F&V
for (j = 1; j <= r - mid; j++) { MLbmz\8a
temp[r - j + 1] = data[j + mid]; `x{*P.]N!<
} 3`%]3qd}
int a = temp[l]; ~F gxhK2+
int b = temp[r]; )Z.v fc
for (i = l, j = r, k = l; k <= r; k++) { ZDQc_{e{
if (a < b) { FTVV+9.l:
data[k] = temp[i++]; V7+fNr]I
a = temp; TBAF_$
} else { qK_jgj=w
data[k] = temp[j--]; } D'pyTf[
b = temp[j]; IE^xk@
} E79'<;K,zs
} %QYH]DR
} 8h,>f#)0c
3}Xf
/** ]~YY#I":
* @param data 9oe=*#Ig1m
* @param l YadG05PDe
* @param i 8@$`'h^6
*/ dH5 Go9`~R
private void insertSort(int[] data, int start, int len) { xtWwz}^8]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,Y)7M3I
} >}"9heF
} q(Q$lRj/I-
} ] I&l0Fx
} ktA5]f;
bR\Oyd~e
堆排序： %0y_WIjz
// k`X
package org.rut.util.algorithm.support; 3Fu5,H EJ
w \U?64
import org.rut.util.algorithm.SortUtil; ><&>JgM
ZC99/NWN
/** ;4%Co)Rw
* @author treeroot e+TSjm
* @since 2006-2-2 v@&UTU
* @version 1.0 ;h7W(NO~z
*/ aVE/qXB
public class HeapSort implements SortUtil.Sort{ D\4pLm"!v
d,5,OJY2f
/* (non-Javadoc) X_\$hF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;%ng])w=;
*/ X-_ $jKfM
public void sort(int[] data) { G`oY(2U
MaxHeap h=new MaxHeap(); _k|k$qxE
h.init(data); Jv8JCu"eky
for(int i=0;i h.remove(); )` ^/Dj;
System.arraycopy(h.queue,1,data,0,data.length); Fd1t/B,
} "XB6k0.#
<K:L.c!
private static class MaxHeap{ W6A-/;S\
-T8'|"g
void init(int[] data){ Ai*+LSG
this.queue=new int[data.length+1]; sqv!,@*q
for(int i=0;i queue[++size]=data; <9/?+)
fixUp(size); U>-GM>
} ]=%oBxWAP
} c!ul9Cw
_, r6t
private int size=0; tJa*(%Z?f
84g8$~M
private int[] queue; 5L0w!q'W
"<$JU@P
public int get() { 0-~F%:x
return queue[1]; r @URs;O=
} -d]v6q'1
3n)\D<f]#
public void remove() { 9zD,z+
SortUtil.swap(queue,1,size--); #GfM!<q<
fixDown(1); )~{8C:
} 9TUB3x^
file://fixdown 68()2v4X
private void fixDown(int k) { !F08F>@D
int j; ,c&%/"i:w
while ((j = k << 1) <= size) { n48%Uwa,
if (j < size %26amp;%26amp; queue[j] j++; ,KaO8^PB
if (queue[k]>queue[j]) file://不用交换 U}<'[o V
break; >*1YL)DBT\
SortUtil.swap(queue,j,k); xxZO{_q
k = j; vVFT0_
} }Sh3AH/
} _ YcIGOL
private void fixUp(int k) { bqwn_=.
while (k > 1) { m+EtB6r
int j = k >> 1; P0l.sVqL
if (queue[j]>queue[k]) 'EO"0,
break; *lBX/O`=
SortUtil.swap(queue,j,k); 3Lm7{s?=Z-
k = j; D"<>!]@(a
} =GL^tAUJ
} /&o<kY
O6b.oS'-
} bb!cZ>Z
)E}eK-Yu
} UJ^-T+fut
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SortUtil： 4Ep6vm X
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package org.rut.util.algorithm; !U~S7h}
!4}Wp.
import org.rut.util.algorithm.support.BubbleSort; <xwaFZ
import org.rut.util.algorithm.support.HeapSort; ;*>':-4
import org.rut.util.algorithm.support.ImprovedMergeSort; Df}3^J~JX
import org.rut.util.algorithm.support.ImprovedQuickSort; 4=ZN4=(_[
import org.rut.util.algorithm.support.InsertSort; w!/|aZ~*
import org.rut.util.algorithm.support.MergeSort; wmaj[e,h
import org.rut.util.algorithm.support.QuickSort; T%@qlEmf
import org.rut.util.algorithm.support.SelectionSort; wQrD(Dv(yA
import org.rut.util.algorithm.support.ShellSort; AxiCpAS;J
AfJ.SNE
/** vve[.Lud'
* @author treeroot ZnRE:=
* @since 2006-2-2 FfibR\dhY
* @version 1.0 0r%,|FaS
*/ ($s%B
public class SortUtil { M%N_4j.
public final static int INSERT = 1; {3N5Fi7S
public final static int BUBBLE = 2; 3.?B')
public final static int SELECTION = 3; FS6I?q#tQ
public final static int SHELL = 4; z{G@t0q
public final static int QUICK = 5; {>zQW{!
public final static int IMPROVED_QUICK = 6; F1b~S;lm
public final static int MERGE = 7; Q) Y&h'.(
public final static int IMPROVED_MERGE = 8; =d1i<iw?-
public final static int HEAP = 9; I.'sK9\Zp
IjrjLp[z$
public static void sort(int[] data) { ZsL-vlv
sort(data, IMPROVED_QUICK); 'H)l~L
} Yc~c(1VRz
private static String[] name={ m|k:wuzqK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b`X"yg+
}; m;m4/z3U
nY=]KU
private static Sort[] impl=new Sort[]{ F(+dX4$
new InsertSort(), -TKQfd
new BubbleSort(), etLA F
new SelectionSort(), O-YB+~"3Z
new ShellSort(), O{44GB3
new QuickSort(), h2fTG
new ImprovedQuickSort(), P1}Fn:Xe%7
new MergeSort(), PU{7s
new ImprovedMergeSort(), 7d'gG[Z^^
new HeapSort() 1F58 2 l
}; cb9q0sdf
AHtLkfr(r
public static String toString(int algorithm){ eWwI@ASaA
return name[algorithm-1]; *WX,bN6Ot
} c!}f\ ]D
>XiTl;UU
public static void sort(int[] data, int algorithm) { _b1w<T `
impl[algorithm-1].sort(data); UkV{4*E
} Ah<6m5+
97n@HL1
public static interface Sort { qOd*9AS'|M
public void sort(int[] data); ,6FmU$ Kn
} 2t7Hu)V
:D!}jN/)
public static void swap(int[] data, int i, int j) { `VxfAV?}
int temp = data; {=GWQn6cc
data = data[j]; ^6[o$eY3
data[j] = temp; |6}:n,KA.
} 4)=\5wJDg1
} 4,pSC