[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! k~ufU
} M4|ION
int i1=l; "kFNOyj3\
int i2=mid+1; NVQ.;"2w
for(int cur=l;cur<=r;cur++){ pSAtn
if(i1==mid+1) ,+d8
data[cur]=temp[i2++]; %O!xrA{
else if(i2>r) F7<u1Rx]
data[cur]=temp[i1++]; 3;jxIo$,
else if(temp[i1] data[cur]=temp[i1++]; Z molL0y
else 97HI9R
data[cur]=temp[i2++]; X
} Y4N7# 5
} Js:U1q
;I@\}!%H
} k{{ Y2B?C
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改进后的归并排序: HS*Y%*
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package org.rut.util.algorithm.support; s-IM
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import org.rut.util.algorithm.SortUtil; /:!l&1l:p
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/** qHheF%[\5
* @author treeroot 'cu14m_
* @since 2006-2-2 d=D#cs;\
* @version 1.0 +tt!xfy
*/ 8*Fn02 p
public class ImprovedMergeSort implements SortUtil.Sort { '5Kj"aD%
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private static final int THRESHOLD = 10; \-Xtbm
3_9CREZCl
/* Z{t `f[
* (non-Javadoc) PZ#up{[o
* "\vQVZd-E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;,uATd|
*/ W!"QtEJ,
public void sort(int[] data) { !5h8sD;
int[] temp=new int[data.length]; NB44GP1-@
mergeSort(data,temp,0,data.length-1); +BO kHXk1
} T#6g5Jnsp
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private void mergeSort(int[] data, int[] temp, int l, int r) { 7K&Uu3m
int i, j, k; @@-TW`G7
int mid = (l + r) / 2; Cb|1Jtb
if (l == r) 2( I4h[
return; -da: j-_
if ((mid - l) >= THRESHOLD) IMM+g]#e
mergeSort(data, temp, l, mid); @d^DU5ats>
else [+l6x1Am
insertSort(data, l, mid - l + 1); >hSu1s:
if ((r - mid) > THRESHOLD) RX_f[
mergeSort(data, temp, mid + 1, r); - q(a~Ge
else k;JDVRL
insertSort(data, mid + 1, r - mid); -{C Gn5]_#
ShlTMTgS
for (i = l; i <= mid; i++) { ,B_tAg4~
temp = data; o~CEja&(
} )}"`$6:k`
for (j = 1; j <= r - mid; j++) { \b6{u6?+
temp[r - j + 1] = data[j + mid]; ~z]VDEJ{q
} D vU1+y
int a = temp[l]; hbr3.<o1lY
int b = temp[r]; y<m[9FC}
for (i = l, j = r, k = l; k <= r; k++) { ]t&^o**
if (a < b) { \Wg_ gA
data[k] = temp[i++]; @PLJ)RL
a = temp; H2Z e\c
} else { GL-b})yy
data[k] = temp[j--]; ,uNJz-B8
b = temp[j]; /:{4,aX2
} }kItVx
} n'q:L(`M
} 5`:d$rv
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/** IC8%E3
* @param data D@.qdRc3
* @param l @^ti*`
* @param i f52P1V]
*/ d-m.aP)y:
private void insertSort(int[] data, int start, int len) { ux!YVvTPd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |& jrU-(
} <I2ENo5?
} &%@O V:C
} \X!NoF
} 7TI6EKr
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堆排序： b$Dh|-8
QY<5o;m`
package org.rut.util.algorithm.support; '+vmC*-I(
r_,;[+!
import org.rut.util.algorithm.SortUtil; `jr?I {m;
;PMh>ZE`
/** D*PEIsV
* @author treeroot m__pQu:
* @since 2006-2-2 l1O"hd'~s
* @version 1.0 o[WDPIG
*/ Z zp"CK 5
public class HeapSort implements SortUtil.Sort{ eV(9I v[
0b n%L~KU
/* (non-Javadoc) GP %hf{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |#SZdXg
*/ e3p:lu
public void sort(int[] data) { ITn PF{N
MaxHeap h=new MaxHeap(); [.Kp/,JY
h.init(data); 1kvs2
for(int i=0;i h.remove(); #,6T.O
System.arraycopy(h.queue,1,data,0,data.length); (C).Vj~
} Ar,n=obG
,p(&G_
private static class MaxHeap{ fn5-Tnsq*
nP*%N|0
void init(int[] data){ N#-pl:J(
this.queue=new int[data.length+1]; I_->vC|>
for(int i=0;i queue[++size]=data; Z0-?;jA@
fixUp(size); >}O}~$o
} v*dw'i
} rcMf1\
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private int size=0; esx/{j;<u
Q@NFfJJ
private int[] queue; W-&V:S{<
10c.#9$
public int get() { ,5ZQPICF
return queue[1]; =8<~pr-NO
} 0jjtx'F
%+Z*-iX
public void remove() { iI7ocyUv
SortUtil.swap(queue,1,size--); t8xXGWk0
fixDown(1); .PR+_a-X
} {]dtA&8(
file://fixdown 0{8L^ jB/
private void fixDown(int k) { %-.;sO=g
int j; rvd%z7Z1o
while ((j = k << 1) <= size) { EEL3~H{(
if (j < size %26amp;%26amp; queue[j] j++; S7PWP<9
if (queue[k]>queue[j]) file://不用交换 sO6=w%l^
break; yrfV&C%=n
SortUtil.swap(queue,j,k); S >CKm:7
k = j; %Pt){9b
} |m ?ZE:
} fHH
private void fixUp(int k) { Rc1k_fZ}
while (k > 1) { xb9+-{<J
int j = k >> 1; S 593wfc
if (queue[j]>queue[k]) g; ]'
break; PRTjXq6)5
SortUtil.swap(queue,j,k); 1TGRIe)
k = j; *0eU_*A^zO
} cY_ke
} P}A!C9Frh
Fr
} 5~:/%+F0=
B,w ZI4oi*
} Ox-eB
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SortUtil： |b.xG_-s1
(?zD!% k
package org.rut.util.algorithm; <EN9s
}(ORh2Ri
import org.rut.util.algorithm.support.BubbleSort; "z3rH~q72
import org.rut.util.algorithm.support.HeapSort; NId.TaXh
import org.rut.util.algorithm.support.ImprovedMergeSort; 5h6o}
import org.rut.util.algorithm.support.ImprovedQuickSort; V8TdtGB.|h
import org.rut.util.algorithm.support.InsertSort; Tsa]SN14
import org.rut.util.algorithm.support.MergeSort; Xw!\,"{s
import org.rut.util.algorithm.support.QuickSort; %%uE^nX>
import org.rut.util.algorithm.support.SelectionSort; 1d]F$>
import org.rut.util.algorithm.support.ShellSort; NzP71t+
G7al@
/** JDE_*xaUV
* @author treeroot VLkAsM5}%
* @since 2006-2-2 LjG^c>[:m
* @version 1.0 eJHh}
*/ g]2L[4
public class SortUtil { |.UY'B
public final static int INSERT = 1; Q^rR}Ws
public final static int BUBBLE = 2; :\His{%
public final static int SELECTION = 3; M%!;5
public final static int SHELL = 4; D5?8`U m=
public final static int QUICK = 5; n%J=!z3
public final static int IMPROVED_QUICK = 6; BrwC9:
public final static int MERGE = 7; @&O4a2+
public final static int IMPROVED_MERGE = 8; HRDpFMA/~
public final static int HEAP = 9; p.=9[`
;t\h"K<,|
public static void sort(int[] data) { }A24;'}
sort(data, IMPROVED_QUICK); M]/aW
} X4!7/&
private static String[] name={ Rxd4{L )n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VoZ{I{>|
}; qVE0[ve
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private static Sort[] impl=new Sort[]{ `/P/2{,~
new InsertSort(), Wa<<"x$
new BubbleSort(), j"69uj` R
new SelectionSort(), `<X-3)>;G
new ShellSort(), !sm/BsmL7T
new QuickSort(), !V37ePFje
new ImprovedQuickSort(), FHSoj=
new MergeSort(), :Tg+)cZ
new ImprovedMergeSort(), 67& hXIp
new HeapSort() ?";SUku
}; ,=m.WmXE
rXX>I;`&
public static String toString(int algorithm){ D'#Q`H
return name[algorithm-1]; 1I9v`eT4
} ;X,u
vv @m{,7#Y
public static void sort(int[] data, int algorithm) { .="XvVdkp
impl[algorithm-1].sort(data); fq6%@M~
} xZ9:9/Vg
n_e'n|T
public static interface Sort { ?W'p&(;
public void sort(int[] data); YNU}R/u6^
} 7R2O[=Szq
,94<j,"
public static void swap(int[] data, int i, int j) { <'I["Um
int temp = data; :;7I_tb
data = data[j]; fo@^=-4A-
data[j] = temp; pD732L@q
} e /JQ #A
} WVy'f|3;