[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; OgjSyzc
} A=q)kcuy5
int i1=l; [@MV[$W5
int i2=mid+1; yLFc?{~7
for(int cur=l;cur<=r;cur++){ ]dB6--
if(i1==mid+1) Jvt| q5
data[cur]=temp[i2++]; HJT}v/FZ
else if(i2>r) 7r#U^d(
data[cur]=temp[i1++]; -AcLh0pc
else if(temp[i1] data[cur]=temp[i1++]; 0?525^
else :Rc>=)<7
data[cur]=temp[i2++]; E/@w6uIK[
} C5;=!B
} \O 9j+L"
ikf6Y$nWfF
} >h>X/a(=~
!kZ9Ox9^
改进后的归并排序: Rk8>Ak(/
a[iuE`
package org.rut.util.algorithm.support; f Co-ony
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import org.rut.util.algorithm.SortUtil; qh;ahX~
4PUSFZK?
/** w[@>k@=
* @author treeroot 7!Z\B-_,
* @since 2006-2-2 &U:bRzD
* @version 1.0 :lQl;Q -e
*/ p$dVGvM(
public class ImprovedMergeSort implements SortUtil.Sort { T% J;~|
Fi.gf?d
private static final int THRESHOLD = 10; +u;f]p
CHp`4
/* YnC7e2
* (non-Javadoc) :X-Z|Pv8
* Fl\X&6k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +grIw#j
*/ FHWzwi*u}
public void sort(int[] data) { T4n.C~
int[] temp=new int[data.length]; *'=JT#
mergeSort(data,temp,0,data.length-1); a=bP
} 8:hUj>qx
|UvM[A|+
private void mergeSort(int[] data, int[] temp, int l, int r) { /Y:1zLs%
int i, j, k; 6#P\DT
int mid = (l + r) / 2; jH26-b<
if (l == r) ,Oojh;P_
return; WoGK05w
if ((mid - l) >= THRESHOLD) p#HbN#^Hy
mergeSort(data, temp, l, mid); "/6<k0.D&
else z,/0e@B >
insertSort(data, l, mid - l + 1); p@`rBzGp
if ((r - mid) > THRESHOLD) \ZiZX$
mergeSort(data, temp, mid + 1, r); SiJ0r @
else J9J[.6k8
insertSort(data, mid + 1, r - mid); /HR9(j6
't".~H_V
for (i = l; i <= mid; i++) { *oLAO/)n
temp = data; sdP% Y<eAT
} MkJ}dncg*
for (j = 1; j <= r - mid; j++) { /MHqt=jP6
temp[r - j + 1] = data[j + mid]; [v$_BS#u^3
} Am=D kkP%
int a = temp[l]; hM
int b = temp[r]; 5m2(7FC%su
for (i = l, j = r, k = l; k <= r; k++) { WK5~"aw
if (a < b) { g7!P|
data[k] = temp[i++]; 1.WdxMpW9
a = temp; c$aTl9e
} else { (3YqM7cqt
data[k] = temp[j--]; t/z]KdK P
b = temp[j]; MIo5Y`T
} IgH[xwzy[
} It,m %5 Py
} JJJlgr]#
q H&7Q{
/** sXm8KV
* @param data -FA]%Pl<'
* @param l nnLE dJ}n
* @param i Am3^3>
*/ Iw(2D(se
private void insertSort(int[] data, int start, int len) { #W`>vd}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9Mo(3M
} \wRbhN
} %v=z|d5-3
} S N_!o2F2
} ^S!^$d*
##VS%&{
堆排序： ^44AE5TO
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package org.rut.util.algorithm.support; w^N xR,
`btw*{.[
import org.rut.util.algorithm.SortUtil; qH'T~#S
~6!{\un
/** F-Mf~+=Dn
* @author treeroot |,CWk|G
* @since 2006-2-2 ?,e7v.b
* @version 1.0 c"R`7P
*/ eaP,MkK&
public class HeapSort implements SortUtil.Sort{ Bv,u kQ\CH
Rb=T'x'
/* (non-Javadoc) VD+TJ` r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |GgFdn`>
*/ ?_36uJo}
public void sort(int[] data) { "e62g
MaxHeap h=new MaxHeap(); NYtp&[s2-
h.init(data); s>d@=P>R
for(int i=0;i h.remove(); 5|YpkY
System.arraycopy(h.queue,1,data,0,data.length); dn/0>|5OF(
} n[4F\I>
}R5>ja0
private static class MaxHeap{ *qKPZb~
vy W/f
void init(int[] data){ 1zNH[
this.queue=new int[data.length+1]; v3 4!rL
for(int i=0;i queue[++size]=data; 7eb^^a?
fixUp(size); %g7 !4
} 9`4mvK/@
} H%NP4pK
JmB7tRM8
private int size=0; mmP>Ji
FC<aX[~&3
private int[] queue; ;taTdzR_
xe}d&
public int get() { <+D(GH};
return queue[1]; pk2OZ,14Mj
} E/x``,k
V9Bi2\s*
public void remove() { _?Zg$7VJ
SortUtil.swap(queue,1,size--); HJ[@;F|aU
fixDown(1); Y6L_ _ RT
} |&Gm.[IX;q
file://fixdown xI?%.Z;*+
private void fixDown(int k) { B[jCe5!w
int j; )G6{JL-I
while ((j = k << 1) <= size) { In)8AK(Hw
if (j < size %26amp;%26amp; queue[j] j++; e"HA.t[A
if (queue[k]>queue[j]) file://不用交换 3'WJx=0?
break; l;^Id#N
SortUtil.swap(queue,j,k); :'RmT3
k = j; EGWm0 F_
} nDx}6}5)
} <PL94
private void fixUp(int k) { SwHrHj
while (k > 1) { c?oNKqPzg
int j = k >> 1; |fX @o0H
if (queue[j]>queue[k]) 6$-Ex
break; t-_~jZ<
SortUtil.swap(queue,j,k); 0~{jgN~
k = j; "IbXKS>t
} qP? V{N
} @{16j#'R
RWM9cV5
} M3- bFIt
F|\^O[#R
} x*GGO)r
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SortUtil： KS%LXc('
3>FeTf#:
package org.rut.util.algorithm; QiBo]`)%
.Fo0AjL}x
import org.rut.util.algorithm.support.BubbleSort; /c3A>
import org.rut.util.algorithm.support.HeapSort; ;]AJ_h(<`
import org.rut.util.algorithm.support.ImprovedMergeSort; ,r\
import org.rut.util.algorithm.support.ImprovedQuickSort; O ;,BzA-n
import org.rut.util.algorithm.support.InsertSort; :%ms6j/B&V
import org.rut.util.algorithm.support.MergeSort; Sx{vZS3
import org.rut.util.algorithm.support.QuickSort; J8Bz|.@Q
import org.rut.util.algorithm.support.SelectionSort; I6?n>
import org.rut.util.algorithm.support.ShellSort; LbX>@2(&
R7%' vZk
/** %Wy$m?gD
* @author treeroot Cx(|ZD^
* @since 2006-2-2 "%$jl0i_c
* @version 1.0 B3 fKb#T
*/ Q;A1&UA2
public class SortUtil { =+24jHs
public final static int INSERT = 1; +>BLox6
public final static int BUBBLE = 2; ph*9,\c8
public final static int SELECTION = 3; qRk&bF/
public final static int SHELL = 4; ;tK%Q~To
public final static int QUICK = 5; tQz=_;jy
public final static int IMPROVED_QUICK = 6; 98 dl -?
public final static int MERGE = 7; LLE\;,bv
public final static int IMPROVED_MERGE = 8; dO/iL7K&
public final static int HEAP = 9; rH@{[~p
m~`d<RM/
public static void sort(int[] data) { rqJ'm?>cr
sort(data, IMPROVED_QUICK); ;MH((M/AN
} 5[<"_
private static String[] name={ #O3Y#2lI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9eOP:/'}w
}; .W4P/Pw'
-|s w\Q
private static Sort[] impl=new Sort[]{ mO];+=3v8
new InsertSort(), 39 D!e&
new BubbleSort(), Cu*+E%P9`
new SelectionSort(), cE(P^;7D
new ShellSort(), 9i+OYWUO
new QuickSort(), uL!QeY>k\
new ImprovedQuickSort(), oSd TQ$U!D
new MergeSort(), -!d'!; ]
new ImprovedMergeSort(), ^d2#J
new HeapSort() e5\/:HpI
}; kn2s,%\`<p
KtTlc#*KU
public static String toString(int algorithm){ bs_>!H1
return name[algorithm-1]; 4^4<Le-G
} Udj!y$?
fC6zDTis8A
public static void sort(int[] data, int algorithm) { %t&
impl[algorithm-1].sort(data); k@[\C`P
} n=t50/jV3=
|qUi9#NUo
public static interface Sort { 25e*W>SLw
public void sort(int[] data); OH.lAF4E(
} 1!N|a< #
!e>+O^
public static void swap(int[] data, int i, int j) { )Z4ilpU,
int temp = data; c*>8VW>
data = data[j]; }STTDq4
data[j] = temp; >4n\
} 9i9'Rd`g
} 5UWj#|t