[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; WAzYnl'p
} HAkEJgV
int i1=l; FCk4[qOp7
int i2=mid+1; sYt\3/yL'
for(int cur=l;cur<=r;cur++){ V3^=Mj2"
if(i1==mid+1) J\WUBt-M
data[cur]=temp[i2++]; dKKh^D`~
else if(i2>r) fR:BF47
data[cur]=temp[i1++]; ^rHG#^hA
else if(temp[i1] data[cur]=temp[i1++]; 4| 6<nk_
else WcG!6.U>
data[cur]=temp[i2++]; 7K*\F}2)q
} eU[f6OGqC
} aJQx"6c?
p "J^
} \R m2c8Z2
}qqE2;{ND
改进后的归并排序: hI&ugdf
1XwW4cZ>:
package org.rut.util.algorithm.support; 5BztOYn,
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import org.rut.util.algorithm.SortUtil; <c,/+ lQ^
{*X8!P7C
/** Qh3V[br
* @author treeroot k|ol+ 9Z
* @since 2006-2-2 \Mi] !b|8
* @version 1.0 h{$mL#J
*/ IQ&o%
public class ImprovedMergeSort implements SortUtil.Sort { X2Z E9b
jJX-S
private static final int THRESHOLD = 10; Hy?+p{{G
_fVC\18T
/* VcLB0T7m\
* (non-Javadoc) v7V.,^6+
* ?gq',FFDq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r_5k$u(
*/ 3Zr'Mn
public void sort(int[] data) { 3eqVY0q
int[] temp=new int[data.length]; r]C`#
mergeSort(data,temp,0,data.length-1); @V9qbr=Z
} OG M9e!
__FhuP P
private void mergeSort(int[] data, int[] temp, int l, int r) { A7/ R5p
int i, j, k; ^kS44pr\Q
int mid = (l + r) / 2; 6{XdLI
if (l == r) $'9b,- e
return; *\UxdL 22
if ((mid - l) >= THRESHOLD) dHcGe{T^(
mergeSort(data, temp, l, mid); NXwlRMbo
else Gk.;<d
insertSort(data, l, mid - l + 1); # j=r
if ((r - mid) > THRESHOLD) L5"|RI}
mergeSort(data, temp, mid + 1, r); Fu K(SP3
else ]^='aQ
insertSort(data, mid + 1, r - mid); w|"cf{$^x
=,*4:TU
for (i = l; i <= mid; i++) { q=o"] 6
temp = data; QQd%V#M?
} W|go*+`W%
for (j = 1; j <= r - mid; j++) { t`"]"Re
temp[r - j + 1] = data[j + mid]; +O@v|}9"w3
} bt$+l[U^J
int a = temp[l]; JG2)-x;9
int b = temp[r]; lL*k!lNs
for (i = l, j = r, k = l; k <= r; k++) { 8gA:s`ofJ
if (a < b) { dMA"% R
data[k] = temp[i++]; n..9F$a
a = temp; N"i'[!H%
} else { w85PRruW
data[k] = temp[j--]; nly`\0C
b = temp[j]; -?8;-h, h
} q><E?
} 'qosw:P
} c`'2
lgxG:zAC
/** EW* 's(
* @param data KUC(n!
* @param l Q k`yK|(0=
* @param i 7p}.r J54
*/ fbbk;Rq.'3
private void insertSort(int[] data, int start, int len) { hM!D6: t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0]v:Ix
} ZaCUc Px
} YpFh_Zr[
} @K 8sNPK
} !l7eB@O
k^|P8v+"D
堆排序： zc QFIP
MPMa
package org.rut.util.algorithm.support; =YPvh]][
~Wq[H
import org.rut.util.algorithm.SortUtil; k+^-;=u6<
KrQ8//Ih
/** G22=8V
* @author treeroot /f!CX|U
* @since 2006-2-2 _,hhO
* @version 1.0 _)q,:g~fu
*/ JrF\7*rh9
public class HeapSort implements SortUtil.Sort{ ZJotg*I
qb+vptg@I
/* (non-Javadoc) p]d3F^*i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c k=
*/ &n% 3rC5{
public void sort(int[] data) { r5!I|E
MaxHeap h=new MaxHeap(); l<7)uO^8
h.init(data); wo;`D
for(int i=0;i h.remove(); N?d4Pu1m
System.arraycopy(h.queue,1,data,0,data.length); Nl_Sgyx,\
} K0xZZ`
0&1!9-(d
private static class MaxHeap{ Vi~9[&.E\!
4Fr0/="H
void init(int[] data){ X@u-n_
this.queue=new int[data.length+1]; ;J3az`
for(int i=0;i queue[++size]=data; f#:7$:{F1
fixUp(size); D.2HM
} Ly?yWS-x
} ;C8'7
F=C8U$'S
private int size=0; (ilU<Ht
_ i )Z8#
private int[] queue; !$'s?rnh
[@@Ovv
public int get() { |C9qM
return queue[1]; xN\PQ,J
} *pN,@ZV$
,*fvA?
public void remove() { ^F<[5e)M
SortUtil.swap(queue,1,size--); ".z~c%'
fixDown(1); DiF=<} >x
} ,4ftQJ
file://fixdown ;b:Ct<
private void fixDown(int k) { 8H_3.MK
int j; ;8UHnhk_O
while ((j = k << 1) <= size) { t@-:e^ v
if (j < size %26amp;%26amp; queue[j] j++; y 1fl=i
if (queue[k]>queue[j]) file://不用交换 O$B]#]L+
break; rm*Jo|eH`
SortUtil.swap(queue,j,k); jyPY]r
k = j; MT" 2^&R
} K,YKU?z6
} )J+vmY~&
private void fixUp(int k) { Au'[|Prr
while (k > 1) { T`46\KkN
int j = k >> 1; UO}Kk*
if (queue[j]>queue[k]) \HFh?3-g
break; F9]j{'#
SortUtil.swap(queue,j,k); T"-HBwl
k = j; 6C>x,kU
} :g/HN9
} "V:B-q
s%`o
} b w5|gmO
a 1bu
} NL))!Pi
MId\dFu
SortUtil： 6sl*Ko[
Dm6WSp1|b
package org.rut.util.algorithm; r?d601(fa
Gk2\B]{
import org.rut.util.algorithm.support.BubbleSort; UT$G?D";M
import org.rut.util.algorithm.support.HeapSort; >L?)f3_a
import org.rut.util.algorithm.support.ImprovedMergeSort; f+Nq?GvwBQ
import org.rut.util.algorithm.support.ImprovedQuickSort; yB(^t`)}N
import org.rut.util.algorithm.support.InsertSort; XXacWdh \
import org.rut.util.algorithm.support.MergeSort; +r9:n(VP
import org.rut.util.algorithm.support.QuickSort; %VsuGA
import org.rut.util.algorithm.support.SelectionSort; zLuej'
import org.rut.util.algorithm.support.ShellSort; J=W"FEXTL7
?f[#O&#
/** 0*W=u-|s6
* @author treeroot ~h?zK1
* @since 2006-2-2 6w<jg/5t
* @version 1.0 o <8L,u(U
*/ -uN5DJSW
public class SortUtil { 71nXROB
public final static int INSERT = 1; <9YRSE[Ed
public final static int BUBBLE = 2; ~:Dr]kt
public final static int SELECTION = 3; 5[[4A]#T
public final static int SHELL = 4; N54U [sy
public final static int QUICK = 5; ^,'!j/w5
public final static int IMPROVED_QUICK = 6; U,Nf&g
public final static int MERGE = 7; )(b]- )
public final static int IMPROVED_MERGE = 8; K[PIw}V$?:
public final static int HEAP = 9; bl(rCbj(w
YmFJlMK
public static void sort(int[] data) { uG&xtN8
sort(data, IMPROVED_QUICK); |i7|QLUT
} "n:z("Q*
private static String[] name={ 5E?{>1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BdB/`X*
}; Af1mTbf=
bcC;i~9
private static Sort[] impl=new Sort[]{ Jj_E/c"
new InsertSort(), HlgF%\@a+U
new BubbleSort(), [2~Et+r6g
new SelectionSort(), =K~<& l8
new ShellSort(), ^aN;M\
new QuickSort(), Vq2d+ ,fb
new ImprovedQuickSort(), <H`&Zqqk
new MergeSort(), _CDUUr
new ImprovedMergeSort(), F#eZfj~
new HeapSort() #GT/Q3{C
}; TB\#frG
xrxORtJ<
public static String toString(int algorithm){ qk{2%,u$@{
return name[algorithm-1]; Co&#mVY4,
} fI;6!M#
6MvjNbQ
public static void sort(int[] data, int algorithm) { Eb{Zm<TP
impl[algorithm-1].sort(data); xX*I.saK
} }&Ngh4/
C:xgM'~+
public static interface Sort { Z0s}65BR
public void sort(int[] data); zMxHJNQ\D
} !E8y!|7$
BZP}0
public static void swap(int[] data, int i, int j) { FM$XMD0=
int temp = data; P!3)-apP\
data = data[j]; c+,F)i^`
data[j] = temp; @{3$H^
} 3Cmbt_WV
} l8 k@.<nCO