[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; ;p!hd}C
} 9QZwUQ
int i1=l; &0Zk3D4
int i2=mid+1; ^K8a#-
for(int cur=l;cur<=r;cur++){ N_[ Q.HD"
if(i1==mid+1) w/W?/1P>q
data[cur]=temp[i2++]; =V]i?31[
else if(i2>r) Q09~vFBg
data[cur]=temp[i1++]; Sz@?%PnU|
else if(temp[i1] data[cur]=temp[i1++]; 2#M:JgWV
else 3Il/3\
data[cur]=temp[i2++]; afq +;Sh
} Y8'_5?+ 0
} QjN3j*@
g@f/OsR76
} ?o5#Ve$-X
@@mW+16
改进后的归并排序: \#7%%>p=O'
pytfsVM
package org.rut.util.algorithm.support; MJpTr5Vs
,,wx197XeD
import org.rut.util.algorithm.SortUtil; c;}n=7,>:L
`|?$; )
/** UI|@5:J
* @author treeroot !-nm7Q
* @since 2006-2-2 <[l}^`IC^4
* @version 1.0 ]JuB6o_L
*/ pFRnPOv
public class ImprovedMergeSort implements SortUtil.Sort { EoWzHa
h,?Yw+#o"
private static final int THRESHOLD = 10; ;QD;5 <1
sn`?Foh
/* K :ptfD
* (non-Javadoc) N ] /d
* 3"D00~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vg1s5Yqk
*/ _!1c.[\T
public void sort(int[] data) { y+R$pzX
int[] temp=new int[data.length]; #N}}8RL
mergeSort(data,temp,0,data.length-1); sswAI|6ou
} pvxqeC9`
-3U} (cZ*
private void mergeSort(int[] data, int[] temp, int l, int r) { 58U[r)/
int i, j, k; 5j5t?G;d,
int mid = (l + r) / 2; ^qr[?ky]&
if (l == r) tO3B_zC
return; "z4E|s
if ((mid - l) >= THRESHOLD) yE{UV>ry
mergeSort(data, temp, l, mid); 4zbV' ]
else uW_ /7ex
insertSort(data, l, mid - l + 1); <_uv!N
if ((r - mid) > THRESHOLD) X]%4QIeS
mergeSort(data, temp, mid + 1, r); o;/F=Zp
else :8T@96]P
insertSort(data, mid + 1, r - mid); G=Bj1ss.
Y%8QFM
for (i = l; i <= mid; i++) { v3#47F)
temp = data; c{(%+
} s5#g[}dj
for (j = 1; j <= r - mid; j++) { :b)@h|4
temp[r - j + 1] = data[j + mid]; T,@7giQg@
} 0_izTke
int a = temp[l]; y%Ah"UY
int b = temp[r]; `&JA7UD>
for (i = l, j = r, k = l; k <= r; k++) { _fw'c*j
if (a < b) { lR^Qm|
data[k] = temp[i++]; J3^Ir [
a = temp; xF0*q
} else { =J\7(0Dz4t
data[k] = temp[j--]; u:?RdB}B_@
b = temp[j]; ]xs\,}I%
} NKYyMHv6
} zaPR>:r0
} g;@PEZk1
3qZ{yr2N[
/** Np_6ZUaqz
* @param data obGSc)?j
* @param l Gl9a5b
* @param i "$9ZkADO
*/ .<hv&t
private void insertSort(int[] data, int start, int len) { N?:S?p9R@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %)]RM/e8
} Rvo<ISp
} |[ofc!/
} $nWmoe)
} Yb*}2
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堆排序： )BDi2: u
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package org.rut.util.algorithm.support; vS<e/e+
ST.W{:X
import org.rut.util.algorithm.SortUtil; qxh\umm+2
b2H6}s"=w
/** 9!h+LGs(,
* @author treeroot j+seJg<_
* @since 2006-2-2 )qe o`4+y
* @version 1.0 ;rbn/6
*/ 1Btf)y'
public class HeapSort implements SortUtil.Sort{ qI:wm=
:#;?dMkTY
/* (non-Javadoc) 6 h):o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iqYc&}k,
*/ Dr609(zg^
public void sort(int[] data) { f}4h}Cq
MaxHeap h=new MaxHeap(); Zx0c6d!B
h.init(data); j>zVC;Sj*
for(int i=0;i h.remove(); S/aPYrk>6
System.arraycopy(h.queue,1,data,0,data.length); l.! ~t1i
} Oylw,*%
2(|V1]6D?
private static class MaxHeap{ I+SL0
;2}Gqh)Yr
void init(int[] data){ 2"T&Fp<
this.queue=new int[data.length+1]; FSk:J~Z;
for(int i=0;i queue[++size]=data; X:5*LB\/v
fixUp(size); f5v|}gMAX
} .>e~J+oL
} @P>@;S
`{":*V
private int size=0; ufOaD7
<j'#mUzd
private int[] queue; `P~RG.HO
(;3jmdJhK
public int get() { 1GxYuTZ{
return queue[1]; 49D*U5o
} umeb&\:8S-
Oh: -Y]m=
public void remove() { %;S5_K,
SortUtil.swap(queue,1,size--); gg9W7%t/
fixDown(1); }sZ]SE
} /k,p]/e
file://fixdown tz{]H9
private void fixDown(int k) { ) AIZE?oX
int j; /~Iy1L#
while ((j = k << 1) <= size) { S3m+(N"&
if (j < size %26amp;%26amp; queue[j] j++; U?>cm`DBP
if (queue[k]>queue[j]) file://不用交换 qeYr=%)c
break; 1/HZY0em
SortUtil.swap(queue,j,k); xXtDGP
k = j; zob-z=='
} w_ m
} (g\'Zw5bk
private void fixUp(int k) { 0IK']C
while (k > 1) { +?p ;,Z%5
int j = k >> 1; ZO~N|s6B^
if (queue[j]>queue[k]) {*m?t 7
break; <tNx*ce5
SortUtil.swap(queue,j,k); jZGmTtx
k = j; 9}-,dgAB
} +qdK]RR}
} j:#[voo7
uIu0"pv`x
} @`{UiTNX`
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} 7iJlW&W
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SortUtil： x;I*Ho
P~&X$H%e
package org.rut.util.algorithm; T-MLW=Vu
Yr!3mU-Uvt
import org.rut.util.algorithm.support.BubbleSort; p0/I}n4<5n
import org.rut.util.algorithm.support.HeapSort; lk}x;4]Z
import org.rut.util.algorithm.support.ImprovedMergeSort; "o1/gV
import org.rut.util.algorithm.support.ImprovedQuickSort; & 3gni4@@
import org.rut.util.algorithm.support.InsertSort; vgV0a{u"
import org.rut.util.algorithm.support.MergeSort; 3yQ(,k#
import org.rut.util.algorithm.support.QuickSort; t|//oEY
import org.rut.util.algorithm.support.SelectionSort; 6Yklaq5
import org.rut.util.algorithm.support.ShellSort; wo/H:3^N
`is6\RH
/** !tVV +vT#
* @author treeroot 7]Z*]GRX
* @since 2006-2-2 3^Ex_jeB
* @version 1.0 sXFD]cF
*/ iL(E`_I<
public class SortUtil { e&:fzO<~I
public final static int INSERT = 1; L6FUC6x"
public final static int BUBBLE = 2; r8qee$^M
public final static int SELECTION = 3; 607#d):Y
public final static int SHELL = 4; J&5|'yVX
public final static int QUICK = 5; "_^FRz#h
public final static int IMPROVED_QUICK = 6; 7YsFe6D"
public final static int MERGE = 7; jE{z4en
public final static int IMPROVED_MERGE = 8; q>Y_I<;'g
public final static int HEAP = 9; ?#W>^Za=
kn!J`"b
public static void sort(int[] data) { T+\BX$w/4e
sort(data, IMPROVED_QUICK); PW}Yts7p
} d;>:<{z@CD
private static String[] name={ 0Y\u,\GrxW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .w0?
}; DQ,QyV
Y$N|p{Z
private static Sort[] impl=new Sort[]{ 9:P)@UF
new InsertSort(), 4m~\S)ad
new BubbleSort(), Axr'zc
new SelectionSort(), !nu#r$K(
new ShellSort(), ' _N >
new QuickSort(), )/BKN`,
new ImprovedQuickSort(), 1vobfZ-w9
new MergeSort(), Y}0-&
new ImprovedMergeSort(), /%.K`BMN
new HeapSort() Y.-i;Mmu
}; c;j]/R$i
[ML4<Eb+x
public static String toString(int algorithm){ ?)9 6YX'
return name[algorithm-1]; U_w)*)F
} zFOX%q
}JI5,d
public static void sort(int[] data, int algorithm) { LnBkd:>}
impl[algorithm-1].sort(data); 4kx#=MLt
} 1j}o.0\
<Wl! Qog'
public static interface Sort { k(s3~S2h
public void sort(int[] data); xa K:@/
} sR5dC_
/6>2,S8Ar
public static void swap(int[] data, int i, int j) { pPh$Jvo]
int temp = data; #ujcT%1G
data = data[j]; R(csJ4F
data[j] = temp; B-o"Y'iXs
} b+{,c@1rd
} ;]p#PNQ0