[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; &Vlno*
} eg[EFI.h
int i1=l; t@%w:*&
int i2=mid+1; g6M>S1oOO
for(int cur=l;cur<=r;cur++){ z/7q#~J,
if(i1==mid+1) E7uIur=g!
data[cur]=temp[i2++]; ]c(FgYc
else if(i2>r) +R'8$
data[cur]=temp[i1++]; +=tdgw/
else if(temp[i1] data[cur]=temp[i1++]; Wf~^,]9N
else )GB#"2
data[cur]=temp[i2++]; nrEI0E9
} oo'9ZE/%
} = 0 ~4k#
oW^b,{~V
} -#\T
&;PxDlY5
改进后的归并排序: 8Km&3nCv$Q
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package org.rut.util.algorithm.support; PGTEIptX7
7oZ:/6_>
import org.rut.util.algorithm.SortUtil; \u[x<-\/6
&V38)83a
/** oz!)x\m*H
* @author treeroot `z!AjAT-G
* @since 2006-2-2 o;8$#gyNY
* @version 1.0 =s\$i0A2
*/ ZFZ'&"+
public class ImprovedMergeSort implements SortUtil.Sort { J8'"vc}=
z"@^'{.l
private static final int THRESHOLD = 10; 4.9qB
d4y#n=HnnV
/* Mh%{cLM
* (non-Javadoc) mWviWHK
* *i"9D:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xm m,-u
*/ TmgC {_
public void sort(int[] data) { r)<A YX]J
int[] temp=new int[data.length]; ,np=m17
mergeSort(data,temp,0,data.length-1); 2Kxb(q"
} jWdviS9&g
]\yIHdcDi
private void mergeSort(int[] data, int[] temp, int l, int r) { cy%M$O|hX5
int i, j, k; _}[ Du/c
int mid = (l + r) / 2; }?[];FB
if (l == r) 6h9(u7(-N
return; ]E9iaq6Z
if ((mid - l) >= THRESHOLD) !Dd'*ee-;
mergeSort(data, temp, l, mid); . ,|C>^
else e@3SF
insertSort(data, l, mid - l + 1); !LKxZ"
if ((r - mid) > THRESHOLD) {;$oC4
mergeSort(data, temp, mid + 1, r); jz!I +
else M5bE5C
insertSort(data, mid + 1, r - mid); d9{lj(2P
teok*'b:
for (i = l; i <= mid; i++) { J/]%zwDwS
temp = data; %" iX3
} }dc0ZRKgx
for (j = 1; j <= r - mid; j++) { z}vT8qoX
temp[r - j + 1] = data[j + mid]; 6wlLE5
} &h:4TaD
int a = temp[l]; Bii'^^I;?
int b = temp[r]; ()lgd7|+
for (i = l, j = r, k = l; k <= r; k++) { EjP;P}_iK
if (a < b) { 6,t6~Uo/
data[k] = temp[i++]; & SXw=;B
a = temp; rm-d),Zt
} else { M=,pn+}y>
data[k] = temp[j--]; %&L13:
b = temp[j]; b++r#Q g
} 6uE20O<z]
} C'#KTp4!1
} 0["93n}r
,{*g Q%7
/** 2ZK]}&yC
* @param data UyGo0POW
* @param l ]J Yz(m[
* @param i +C%6jGGh
*/ &bTCTDZh
private void insertSort(int[] data, int start, int len) { n Bm ]?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dGZie.Zx
} o2fih%p?1
} }aWy#Oe
} tLzLO#/n
} ]B/>=t"E
_H$Lu4b)N
堆排序： hjL;B'IL
hBU)gP75
package org.rut.util.algorithm.support; w=GMQ8
).KA0-
import org.rut.util.algorithm.SortUtil; 5]O{tSj
gWj-@o\
/** B.N#9u-vW
* @author treeroot ` o)KG,
* @since 2006-2-2 7xnj\9$m
* @version 1.0 ZTR9e\F
*/ 1EU4/6!C
public class HeapSort implements SortUtil.Sort{ _=g&^_ #t
%a/3*vz/I%
/* (non-Javadoc) /A9RmTb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8lQ}-8
*/ 5kHaZ Q
public void sort(int[] data) { 217G[YE-
MaxHeap h=new MaxHeap(); =j>xu|q
h.init(data); Yjoe|
for(int i=0;i h.remove(); <Km9Mq
System.arraycopy(h.queue,1,data,0,data.length); 4 OPY
} *'((_NZ>
mCO1,?
private static class MaxHeap{ ox-m)z `7
P~ObxY|
void init(int[] data){ aUw-P{zp%
this.queue=new int[data.length+1]; O3sV)
for(int i=0;i queue[++size]=data; (?e%w}
fixUp(size); Ph3;;,v '
} 53t_#Yte
} Dg&6@c|
x^1udK^re
private int size=0; 5FOMh"!z\
=MNp;
private int[] queue; yGR{-YwU!
*OLqr/ yb
public int get() { 1Q@]b_"Xh
return queue[1]; ImN'o4vo
} /8GdCac
/1OCK=
public void remove() { c~<;}ve^z
SortUtil.swap(queue,1,size--); J&8KIOz14Z
fixDown(1); lu.]R>w
} +a5F:3$
file://fixdown O`Tz^Q/D
private void fixDown(int k) { 8c5YX
int j; ]}3s/NJi
while ((j = k << 1) <= size) { \_Bj"K
if (j < size %26amp;%26amp; queue[j] j++; P j
if (queue[k]>queue[j]) file://不用交换 C|ZPnm>f30
break; RU)(|;
SortUtil.swap(queue,j,k); wn"}<ka
k = j; "BQnP9
} nCYkUDnZ
} Ty g>Xv
private void fixUp(int k) { b,'O|s]"Sc
while (k > 1) { 01A{\O1$j
int j = k >> 1; ` -_!%m/
if (queue[j]>queue[k]) >jt2vU@t.
break; SwOW%o
SortUtil.swap(queue,j,k); x;~:p;]J2F
k = j; K1@Pt}
} </[.1&S+\
} S=4o@3%$
9xR5Jm>k
} ovKM;cRs/
ABCm2$<
} Yg&(kmm
?X@!jB,Pv
SortUtil： 7P1Pk?pxy
4)gG_k
package org.rut.util.algorithm; x7S\-<8
!Gmnck&+
import org.rut.util.algorithm.support.BubbleSort; @j|E"VYY
import org.rut.util.algorithm.support.HeapSort; &5 "!0
import org.rut.util.algorithm.support.ImprovedMergeSort; 3^/w`(-{@
import org.rut.util.algorithm.support.ImprovedQuickSort; >V6t L;+
import org.rut.util.algorithm.support.InsertSort; =UKxf
import org.rut.util.algorithm.support.MergeSort; _[HZ[9c!
import org.rut.util.algorithm.support.QuickSort; L-|l$Ti"
import org.rut.util.algorithm.support.SelectionSort; @:>]jp}uq
import org.rut.util.algorithm.support.ShellSort; 0:V/z3?
I!hh_
/** l5D)UO
* @author treeroot ,iV%{*p]
* @since 2006-2-2 @f-:C+(Nsg
* @version 1.0 4p"'ox#
*/ Bve|+c6W
public class SortUtil { *qzdt^[ xo
public final static int INSERT = 1; zxn|]PbS
public final static int BUBBLE = 2; ep6+YK:cn
public final static int SELECTION = 3; flCT]ZR
public final static int SHELL = 4; VM$n|[C~
public final static int QUICK = 5; $yx\2
public final static int IMPROVED_QUICK = 6; 6ld4'oM
public final static int MERGE = 7; ">[#Ops-;$
public final static int IMPROVED_MERGE = 8; *D|a`R!Y
public final static int HEAP = 9; %n|
_wKwiJs
public static void sort(int[] data) { Jxvh;
sort(data, IMPROVED_QUICK); h ;*x1BVE
} YYQvt
private static String[] name={ @;egnXxF<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =gj?!d`
}; ?oYO !
IAO5li3
private static Sort[] impl=new Sort[]{ Wk[a|>
new InsertSort(), BgXZr,?
new BubbleSort(), 6l\5J6x
new SelectionSort(), AlQhKL}|s
new ShellSort(), mG1~rI
new QuickSort(), C~2!@<y
new ImprovedQuickSort(), p]kEH\ sh
new MergeSort(), TsFhrtnx&X
new ImprovedMergeSort(), -lo?16w
new HeapSort() 9"P+K.%
}; YdhV a!Y
<@Q27oEuA
public static String toString(int algorithm){ d]0:r]e
return name[algorithm-1]; w;,34qbf
} &'u|^d
it}h8:^<
public static void sort(int[] data, int algorithm) { o898pg
impl[algorithm-1].sort(data); 27!FB@k-
} 9VW/Af
`jeATxWv
public static interface Sort { t=Oq<r
public void sort(int[] data); Tf3CyH!k
} rn-bfzoDS
QATRrIj{e
public static void swap(int[] data, int i, int j) { }#m9Q[
int temp = data; c4AJ`f.5
data = data[j]; |[rn/
data[j] = temp; IP`lx
} y_9\07va<
} *J4!+GD