[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; M_4:~&N$
} $2M dxw5
int i1=l; WG_20JdJY
int i2=mid+1; zJp@\Yo+
for(int cur=l;cur<=r;cur++){ A|D]e)/6+B
if(i1==mid+1) \*_@`1m
data[cur]=temp[i2++]; _v+mjDdQ
else if(i2>r) .skR4f,h
data[cur]=temp[i1++]; .kGlUb?^Q
else if(temp[i1] data[cur]=temp[i1++]; 8-wW?YTG
else y8{PAH8S
data[cur]=temp[i2++]; 3>`CZ]ip}
} 2|1s!Q
} 0> 6;,pd"
3gn)q>Xj$
} 4rh*&'
v GF<
改进后的归并排序: ~[mAv#d&i
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package org.rut.util.algorithm.support; :LuzKCvBP
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import org.rut.util.algorithm.SortUtil; O@ GEl
nVTCbV
/** kJJUu
* @author treeroot n>w/T"
* @since 2006-2-2 WG{mg/\2(C
* @version 1.0 ]J t8]w
*/ 4<['%7U_[
public class ImprovedMergeSort implements SortUtil.Sort { F=29"1 ._
*hT1_
private static final int THRESHOLD = 10; 6PS #Zydb
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/* o@o6<OP^
* (non-Javadoc) myVV5#{
* 9Q#eu~R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DiB~Ovh|
*/ V0gk8wD
public void sort(int[] data) { Ch1+YZG
int[] temp=new int[data.length]; lD8&*5tDmP
mergeSort(data,temp,0,data.length-1); 5PJB<M_m:
} &?@gUk74"
yW$ja|^E
private void mergeSort(int[] data, int[] temp, int l, int r) { *|f&a
int i, j, k; wXc"Car)
int mid = (l + r) / 2; ;JcOm&d/hk
if (l == r) w2:!yQk_
return; 2o`a^'Iw
if ((mid - l) >= THRESHOLD) 5!55v
mergeSort(data, temp, l, mid); 1GnT^u y/
else 4DVkycM
insertSort(data, l, mid - l + 1); u#8J`%g
if ((r - mid) > THRESHOLD) b"ypS7 _
mergeSort(data, temp, mid + 1, r); n.{+\M6k
else )U`"3R
insertSort(data, mid + 1, r - mid); hSZ0 }/
VWlOMqL995
for (i = l; i <= mid; i++) { IeqJ>t:
temp = data; T4dYC'z
} r@xMb,!H
for (j = 1; j <= r - mid; j++) { FQR{w
temp[r - j + 1] = data[j + mid]; {(7D=\eU
} uv++Kj!
int a = temp[l]; 3dnL\AqC
int b = temp[r]; g& yR-
for (i = l, j = r, k = l; k <= r; k++) { c3gy{:lb
if (a < b) { :<OInKE>Cx
data[k] = temp[i++]; ?"p:6%GFz
a = temp; =?`5n|A*
} else { }}3*tn<6
data[k] = temp[j--]; 7-M$c7S
b = temp[j]; Vrf+~KO7
} gY], (*v
} B)F2SK<@
} 3z[yKua\
iQczvn)"m
/** <qzHMyAi
* @param data 27-<q5q
* @param l um@RaU
* @param i zaX!f~;"
*/ uf*sI
private void insertSort(int[] data, int start, int len) { ,Ty>sZ#/fz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BJ3st
} *M_.>".P
} [=Wn7cr
} X[8m76/V
} z.g'8#@
:\Z;FA@g(g
堆排序： .`!|^h%0
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package org.rut.util.algorithm.support; A2z%zMlZc
B.&ly/d
import org.rut.util.algorithm.SortUtil; W:uIG-y~
oy!W$ ?6
/** G3P3
* @author treeroot pR8]HNY0
* @since 2006-2-2 :K&
* @version 1.0 E[J7FgU)<S
*/ tr2@{xb
public class HeapSort implements SortUtil.Sort{ M:W9h+z
t_&FK A
/* (non-Javadoc) ;m}lmq,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) da3]#%i0
*/ $4`RJ{ZJw]
public void sort(int[] data) { _pQ9q&i4
MaxHeap h=new MaxHeap(); guv)[:cd;
h.init(data); ,MwwA@,9-
for(int i=0;i h.remove(); ZD1UMB0$4
System.arraycopy(h.queue,1,data,0,data.length); S%b7NK
} A%n l@`s,
#.0^;M5Nh
private static class MaxHeap{ 6Flc4L8JU
h"KN)xi$
void init(int[] data){ '$~9~90?Z
this.queue=new int[data.length+1]; #;U_ L`q
for(int i=0;i queue[++size]=data; 5AR\'||u
fixUp(size); 4J2NIFZ
} OvU]|4h
} @R>4b
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private int size=0; mq~7v1kw
u>H^bCXI
private int[] queue; De[!^/f;T
y";{k+
public int get() { pi? q<p%
return queue[1]; 8^;[c
} )`Tny]M
.:c^G[CQ^9
public void remove() { 7|3Z+#|T
SortUtil.swap(queue,1,size--); ):eX*
fixDown(1); *&>1A A
} St/Hv[H'[E
file://fixdown Yt2_*K@rC
private void fixDown(int k) { E/:<9xl
int j; ?gjM]Ki%:
while ((j = k << 1) <= size) { _ Onsfv
if (j < size %26amp;%26amp; queue[j] j++; aYe,5dK>
if (queue[k]>queue[j]) file://不用交换 pL>Q'{7s3
break; ,;C92XY
SortUtil.swap(queue,j,k); y}ezjs
k = j; E0}`+x
} =LuH:VM&
} yowvq4e
private void fixUp(int k) { JP9eNc[
while (k > 1) { Z~$=V:EA?
int j = k >> 1; F<X)eO]tk
if (queue[j]>queue[k]) nJ.pPzH2g
break; InMeD[*^
SortUtil.swap(queue,j,k); DqrS5!C
k = j; di`Ql._M
} oddS~lW
} ofl3G {u
{hK$6bD3^
} :*#AJV)
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} GDP@M)~6*
WA~|:S+
SortUtil： bAt%^pc=y
^x%yIS
package org.rut.util.algorithm; ~!j1</$_
{FraM,w:
import org.rut.util.algorithm.support.BubbleSort; rE[*iq,#
import org.rut.util.algorithm.support.HeapSort; p+#J;.
import org.rut.util.algorithm.support.ImprovedMergeSort; O9oVx4=
import org.rut.util.algorithm.support.ImprovedQuickSort; 83:m7;
import org.rut.util.algorithm.support.InsertSort; }Gr5TDiV0\
import org.rut.util.algorithm.support.MergeSort; Skl1%`
import org.rut.util.algorithm.support.QuickSort; '@RlKMnN
import org.rut.util.algorithm.support.SelectionSort; / O6n[qj|
import org.rut.util.algorithm.support.ShellSort; z}yntY]n
c*K-?n9YMz
/** -ZH]i}$
* @author treeroot U/Z!c\r
* @since 2006-2-2 jE2k\\<a
* @version 1.0 |HI=ykfI
*/ EbuOPa
public class SortUtil { j% !
public final static int INSERT = 1; ;^lVIS%&{
public final static int BUBBLE = 2; `4}zB#3
public final static int SELECTION = 3; ,*a8]L
public final static int SHELL = 4; qS>P,>C
public final static int QUICK = 5; OF,<K%A
public final static int IMPROVED_QUICK = 6; EU TTeFp
public final static int MERGE = 7; beEdH>
public final static int IMPROVED_MERGE = 8; bSU9sg\
public final static int HEAP = 9; 2X;,s`)
BgJ;\NV
public static void sort(int[] data) { <_8\}!
sort(data, IMPROVED_QUICK); ' ~lC85
} YN9ug3O+
private static String[] name={ FVT_%"%C9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]plg@
}; T/MbEqAf
6cVaO@/(
private static Sort[] impl=new Sort[]{ e(x1w&8dB
new InsertSort(), /cexd_l|f
new BubbleSort(), GKH7Xx(
new SelectionSort(), F N;X"it.
new ShellSort(), Erl"X}P
new QuickSort(), nsij;C
new ImprovedQuickSort(), i*..]!7e
new MergeSort(), 'g^;_=^G
new ImprovedMergeSort(), 9 Bz~3
new HeapSort() M' "S:
}; ueZ`+g~gg
5[]7baO)h1
public static String toString(int algorithm){ 7=u\D
return name[algorithm-1]; LR]P?
} /@lXQM9T
GfD!Z3
public static void sort(int[] data, int algorithm) { pY!@w0.
impl[algorithm-1].sort(data); 0^*4LM|z
} j!iimdq
Xgn^)+V:
public static interface Sort { 5@P2Z]Q
public void sort(int[] data); \;I%>yOIu
} $dFEC}1t
?%i|].<-'
public static void swap(int[] data, int i, int j) { Cd#[b)d ?^
int temp = data; *5hg}[n2
data = data[j]; !h}x,=`z/
data[j] = temp; ]}i_NqW)
} V9I5/~0c
} @sav8]