[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; %huRsQ%}
} +Um( h-;
int i1=l; *e<[SZzYZ
int i2=mid+1; gGvz(R:y
for(int cur=l;cur<=r;cur++){ |"?M1*g
if(i1==mid+1) FI[A[*fi
data[cur]=temp[i2++]; 3Q"<<pi!~
else if(i2>r) b $'FvZbk
data[cur]=temp[i1++]; +GG9^:<yr
else if(temp[i1] data[cur]=temp[i1++]; *Tas`WA
else #~#R-
data[cur]=temp[i2++]; bmJ5MF]_fG
} _|iSF2f,X
} KmMzH`t}`
m/Oh\KlIl
} 4 kn|^
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改进后的归并排序: N<|@ymi
O#b6mKPt;t
package org.rut.util.algorithm.support; N+++4;
! _f9NK
import org.rut.util.algorithm.SortUtil; YT8vP~
5}:-h>
/** ?u-|>N>
* @author treeroot 1jCLO}
* @since 2006-2-2 Mc=$/ o
* @version 1.0 OJ,`
*/ uPhK3nCGo
public class ImprovedMergeSort implements SortUtil.Sort { t,,k
6tXq:
private static final int THRESHOLD = 10; !i{aMxUP
Q(@U2a8
/* 3cFf#a#
* (non-Javadoc) AZ0;3<FfLp
* H+1-]'g`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _/F7?^j
*/ Hx#;Z
public void sort(int[] data) { jB`,u|FG
int[] temp=new int[data.length]; AB=daie
mergeSort(data,temp,0,data.length-1); RzBF~2 >i
} _XG/Pp)
4 K!JQ|9
private void mergeSort(int[] data, int[] temp, int l, int r) { U@g4w!$r
int i, j, k; n.T&}ZPz\v
int mid = (l + r) / 2; @$lG@I,[
if (l == r) }#.L7SIJ<J
return; y603$Cv
if ((mid - l) >= THRESHOLD) jNTjSX
mergeSort(data, temp, l, mid); /~}}"zx&
else `Zf^E >)
insertSort(data, l, mid - l + 1); >Nvjl~o5
if ((r - mid) > THRESHOLD) 8WtsKOno
mergeSort(data, temp, mid + 1, r); PRr2F-!P
else (}a8"]Z
insertSort(data, mid + 1, r - mid); TFH\K{DM
mk1bcK9
for (i = l; i <= mid; i++) { DSC$i|
temp = data; wLmhy,
} Nd`%5%'::
for (j = 1; j <= r - mid; j++) { b@rVo;
temp[r - j + 1] = data[j + mid]; }'""(,2
} 2HpHxVJ
int a = temp[l]; vk+VP 1D
int b = temp[r]; |rJ=Ksc
for (i = l, j = r, k = l; k <= r; k++) { t0o`-d(
if (a < b) { 21 O'M
data[k] = temp[i++]; >*]Hq.&8
a = temp; '>&^zgr
} else { q;QbUO
data[k] = temp[j--]; !u_Y7i3^
b = temp[j]; ;gBRCZ
} PUF/#ck
} 'ixwD^x
} hJn%mdx~w|
bLe<G
/** *+-}P|S:
* @param data 3AQZRul
* @param l dls ss\c^M
* @param i WOQP$D9
*/ 4kG,*3&2
private void insertSort(int[] data, int start, int len) { 86(I^=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n;(\5{a
} `wus\&!W
} h(M#f7'~&
} kB/D!1 "
} KMU4n-s"o
? i( %
堆排序： OJ/,pLYu
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package org.rut.util.algorithm.support; K@#(*."
@c<3b2
import org.rut.util.algorithm.SortUtil; J13>i7]L%
kD*2~Z?;
/** !'mq ?C=
* @author treeroot wW#}:59}
* @since 2006-2-2 c.,2GwW
* @version 1.0 c}y [[EX
*/ Z0o~+Ct$
public class HeapSort implements SortUtil.Sort{ AT9q3
Eve.QAl|
/* (non-Javadoc) cJ1#ge%4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R,F[XI+=N
*/ *Txl+zTY
public void sort(int[] data) { `0P$#5?
MaxHeap h=new MaxHeap(); )=AHf?hn
h.init(data); <FWF<r3F
for(int i=0;i h.remove(); PNaay:a|
System.arraycopy(h.queue,1,data,0,data.length); :cq9f2)
} 0TGLM#{
>S'17D
private static class MaxHeap{ +RnkJ* l
J(c{y]`J
void init(int[] data){ YN`H BFH
this.queue=new int[data.length+1]; 1_\;- !t
for(int i=0;i queue[++size]=data; !1q 9+e
fixUp(size); E}sO[wNPf
} dHK`eS$sb
} SzUpWy&
>TQH|}|6(y
private int size=0; xKQ+{"?-^g
Hm$=h>rY9[
private int[] queue; NX|v=
QNARkYY~|
public int get() { 1jc, Y.mP
return queue[1]; yqi^>Ce0
} "FTfk
f. FYR|%tq
public void remove() { SE),":aY
SortUtil.swap(queue,1,size--); ``OD.aY^s
fixDown(1); 'bo~%WA]n
} XLL/4)
file://fixdown [1F*bI
private void fixDown(int k) { 'ow.=1N-
int j; =li|
while ((j = k << 1) <= size) { 4\6N~P86
if (j < size %26amp;%26amp; queue[j] j++; :{oZ~<
if (queue[k]>queue[j]) file://不用交换 Y=?yhAw
break; P#fM:z@[
SortUtil.swap(queue,j,k); d1U\ft:gV
k = j; ,(;lIP
} ~ug= {b
} Nkp)Ax&
private void fixUp(int k) { 6S+U&Ce\
while (k > 1) { j{NNSi3
int j = k >> 1; xA9:*>+>
if (queue[j]>queue[k]) >lBD<;T
break; (HSgEs1d
SortUtil.swap(queue,j,k); RTv qls
k = j; lWqrU1Sjl
} # g_Bx
} xj[(P$,P
BQ @huns3
} ]ut5S>,"
D5:{fWVsV/
} F$^Su<w5l
CT1ja.\;
SortUtil： 2AtLyN'.
6%fKuMpK(
package org.rut.util.algorithm; (4\d]*u5-c
QK+(g,)_86
import org.rut.util.algorithm.support.BubbleSort; "m^' &L
import org.rut.util.algorithm.support.HeapSort; ^`G`phd$
import org.rut.util.algorithm.support.ImprovedMergeSort; TEMw8@b
import org.rut.util.algorithm.support.ImprovedQuickSort; G 2mX;
import org.rut.util.algorithm.support.InsertSort; glDh([
import org.rut.util.algorithm.support.MergeSort; h;-yU.(w
import org.rut.util.algorithm.support.QuickSort; q+[SbG&
import org.rut.util.algorithm.support.SelectionSort; CYKr\DA
import org.rut.util.algorithm.support.ShellSort; %zSuK8kxV
1&P<
/** ($LLl;1
* @author treeroot @"o@}9=d
* @since 2006-2-2 #?XQ7Im
* @version 1.0 KX}Rr7a
*/ P1NJ^rX
public class SortUtil { BSkDpr1C
public final static int INSERT = 1; P0$e~=Q^4
public final static int BUBBLE = 2; fPrLM'
public final static int SELECTION = 3; )x]3Zq
public final static int SHELL = 4; STglw-TC\
public final static int QUICK = 5; +Y V|ij
public final static int IMPROVED_QUICK = 6; BbRBT@
public final static int MERGE = 7; A.D{.a
public final static int IMPROVED_MERGE = 8; !xwG%{_
public final static int HEAP = 9; 11,!XD*"
jZ%TJ0(H
public static void sort(int[] data) { fPR$kch
sort(data, IMPROVED_QUICK); CT\;xt,S
} _ z;q9&J)
private static String[] name={ Z(ZiFPx2Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9W8]8sUeG
}; PC qZNBN
(D 9Su^:1
private static Sort[] impl=new Sort[]{ @rHK(25+d
new InsertSort(), YhRWz=l
new BubbleSort(), /5#rADOS
new SelectionSort(), >+mD$:L
new ShellSort(), jn:NYJv
new QuickSort(), k2xHH$+{#=
new ImprovedQuickSort(), 7y`}PMn
new MergeSort(), (708H_
new ImprovedMergeSort(), c)Ic#<e(
new HeapSort() DaH?@Q
}; gZEi]/8_
5"/J^"!h
public static String toString(int algorithm){ IQ!\w-
return name[algorithm-1]; gaf$uT2
} @A+RVg*=
ex<O]kPFE
public static void sort(int[] data, int algorithm) { suH&jE$x
impl[algorithm-1].sort(data); siTX_`0
} c,Euv>*`
vm'5s]kdh
public static interface Sort { @w>zF/
public void sort(int[] data); 0I{gJSK.,
} xP=/N!,#
lKkN_ (/j
public static void swap(int[] data, int i, int j) { S2>c#BQ
int temp = data; 5VO;s1
data = data[j]; .0G6flD
data[j] = temp; CdUAy|!`R
} N-g8}03
} ?DH"V7bs