[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; ?}RSwl
} 2;^y4ssg
int i1=l; ?I[8'
int i2=mid+1; H*Kj3NgY
for(int cur=l;cur<=r;cur++){ B,K>rCZ/
if(i1==mid+1) -x'z XvWZ
data[cur]=temp[i2++]; \z$p%4`E@
else if(i2>r) W0k0$\iX
data[cur]=temp[i1++]; ~d%Pnw|
else if(temp[i1] data[cur]=temp[i1++]; t7m>A-I
else $P(v{W)
data[cur]=temp[i2++]; eOXHQjuj
} 8 XICF
} O=$~O\}b
VA9Gb9
} o4%y>d)
#%D_Y33;
改进后的归并排序: ) :\xHR4
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package org.rut.util.algorithm.support; ~5 *5
cFJ-Mkll
import org.rut.util.algorithm.SortUtil; B7]C]=${m
E[*Fz1>
/** ^ mS o1?<
* @author treeroot |{@8m9JR
* @since 2006-2-2 UY<e&Npo
* @version 1.0 `8I&7c
*/ *0|IXGr
public class ImprovedMergeSort implements SortUtil.Sort { /-qxS <?o
KLL;e/Gf
private static final int THRESHOLD = 10; ?@6/E<-Z$
H.WE6
/* }>'PT-
* (non-Javadoc) <]T`3W9
* LK;k'IJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9{$<0,?
*/ *0}3t<5
public void sort(int[] data) { IhBp%^H0-
int[] temp=new int[data.length]; (&P9+Tl
mergeSort(data,temp,0,data.length-1); kdCP
} x&`~R>5/
%rF?dvb;?
private void mergeSort(int[] data, int[] temp, int l, int r) { gi-Yqco
int i, j, k; W0C@9&pn6
int mid = (l + r) / 2; yY&3p1AxW]
if (l == r) GV^i`r^"
return; i:cXwQG}B
if ((mid - l) >= THRESHOLD) 1$2D O
mergeSort(data, temp, l, mid); cwuO[^S}
else Sje wuIi1
insertSort(data, l, mid - l + 1); |hO~X~P
if ((r - mid) > THRESHOLD) u1~9{"P*
mergeSort(data, temp, mid + 1, r); &tZG @
else `xc^_781\
insertSort(data, mid + 1, r - mid); $&=p+
3GmeD/6
for (i = l; i <= mid; i++) { +,&O1ykY
temp = data; ,j?.4{rHJ
} 7nVRn9Hn
for (j = 1; j <= r - mid; j++) { AWjm~D-?
temp[r - j + 1] = data[j + mid]; bO;(bE m@
} e }*0ghKI
int a = temp[l]; M@(^AK{mU
int b = temp[r]; jV/CQM5a+
for (i = l, j = r, k = l; k <= r; k++) { i,nm`Z>u
if (a < b) { H Y ynMP
data[k] = temp[i++]; Ka|eFprS
a = temp; 0vGyI>
} else { W{5:'9,
data[k] = temp[j--]; ZO7&vF}
b = temp[j]; 9Q!bt
} Dl&GJ`&:p
} ~RBrSu)
} 3pXLSdxB
vNW jH!'
/** 2T)sXBu
* @param data vMs;>lhtg
* @param l !>(RK"KWq]
* @param i fIocq
*/ f7hXQ|$
private void insertSort(int[] data, int start, int len) { >az;!7~cD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t0#[#I1+
} d"U(`E=H9
} m9md|yS
} Zw] ?.
} {C^@Q"I
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堆排序： nW+YOX|+
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package org.rut.util.algorithm.support; (X6sSO
CkRX>)=py
import org.rut.util.algorithm.SortUtil; x3e]d$
O}#yijU3e
/** DP7C?}(
* @author treeroot 7W9~1 .SC
* @since 2006-2-2 [rreFSy#@
* @version 1.0 m=b~i^@
*/ cUK\x2
public class HeapSort implements SortUtil.Sort{ g6sjc,`
^+R:MBK
/* (non-Javadoc) i_F$&?)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n+D#k 8{
*/ b>~RSO*
public void sort(int[] data) { Gqyue7;0,
MaxHeap h=new MaxHeap(); YCw('i(|
h.init(data); c[0oh.
for(int i=0;i h.remove(); m&R"2t_Z
System.arraycopy(h.queue,1,data,0,data.length); c-5jYwV
} %HSl)zEo>C
MFg'YA2/
private static class MaxHeap{ 5@XV6
PM4>ThQ
void init(int[] data){ -{9Gagy2&
this.queue=new int[data.length+1]; LxT rG)4
for(int i=0;i queue[++size]=data; kd;'}x=5yP
fixUp(size); 9.0WKcwg
} gKL1c{BV
} +zRh fIJHH
Dw |3Z
private int size=0; K!b8= K`
GM}C]MVD
private int[] queue; 'Kis hXOn]
/#yA%0=w
public int get() { 9NWloK6bT
return queue[1]; _@E "7<\
} O}gX{_|6
-3mgza
public void remove() { @8"18HEp#
SortUtil.swap(queue,1,size--); k!doIMj
fixDown(1); .v,bXU$@YG
} ) p^
file://fixdown GOW"o"S
private void fixDown(int k) { /S/aUvN
int j; +5*vABvCu
while ((j = k << 1) <= size) { 9bEM#Hj
if (j < size %26amp;%26amp; queue[j] j++; )C}KR`"
if (queue[k]>queue[j]) file://不用交换 2cjEex:&
break; l#6&WWmr
SortUtil.swap(queue,j,k); Z}[xQ5
k = j; d~<QAh#rG
} @xJCn}`Zj
} sPpS~wk*
private void fixUp(int k) { ycjJbL(.
while (k > 1) { qG^_c;l6a
int j = k >> 1; ,xj3w#`zaf
if (queue[j]>queue[k]) 8&T,LNZoY
break; QSmJ`Bm
SortUtil.swap(queue,j,k); p1 4d,}4W
k = j; 0l1.O2-
} DoG%T(M!a9
} S*rO0s:
(H[
} fM{1Os
<N5rv3 s
} XSl!T/d
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SortUtil： `A"Q3sf%
L1F###c
package org.rut.util.algorithm; nFj-<!
Q,n4i@E
import org.rut.util.algorithm.support.BubbleSort; 'f6PjI
import org.rut.util.algorithm.support.HeapSort; #~1wv^
import org.rut.util.algorithm.support.ImprovedMergeSort; =Pj@g/25u
import org.rut.util.algorithm.support.ImprovedQuickSort; wlL8X7+:
import org.rut.util.algorithm.support.InsertSort; Nor`c+,4
import org.rut.util.algorithm.support.MergeSort; Y.9~Bo<<r
import org.rut.util.algorithm.support.QuickSort; 1XGG.+D
import org.rut.util.algorithm.support.SelectionSort; 2x6<8J8v*
import org.rut.util.algorithm.support.ShellSort; ~BtKd*~*
N)P((>S;
/** -^Rb7g-
* @author treeroot DH/L`$
* @since 2006-2-2 ]xI?,('_m
* @version 1.0 &8waih(|
*/ s1Okoxh/!V
public class SortUtil { LjC6?a_?l
public final static int INSERT = 1; }ymc5-
public final static int BUBBLE = 2; IJldN6&\q
public final static int SELECTION = 3; N-D(y
public final static int SHELL = 4; ^~, ndH{
public final static int QUICK = 5; R|$[U
public final static int IMPROVED_QUICK = 6; Ou? r {$(b
public final static int MERGE = 7; ]u;GNz}?
public final static int IMPROVED_MERGE = 8; Pf{`/UlD
public final static int HEAP = 9; rv`2*B
8i[".9}G\
public static void sort(int[] data) { L)1C'8).
sort(data, IMPROVED_QUICK); D9,e3.?p
} jzMhJ
private static String[] name={ ot]>}[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iwB8I^
}; {ip=iiW2
)-)ss"\+Ju
private static Sort[] impl=new Sort[]{ W0C{~|e
new InsertSort(), 2rF?Q?$,B
new BubbleSort(), xQX<w\s
new SelectionSort(), O<4Q$|=&?
new ShellSort(), c]e`m6
new QuickSort(), :m]/u( /N
new ImprovedQuickSort(), O>nK,.
new MergeSort(), qo)Q}0
new ImprovedMergeSort(), +:fqL
new HeapSort() D&4u63^
}; t'dHCp}
i5.?g<.H
public static String toString(int algorithm){ A<mj8qz
return name[algorithm-1]; ~g*Y, Y
} $*YC7f
dVPq%[J2
public static void sort(int[] data, int algorithm) { N$C{f;xV
impl[algorithm-1].sort(data); g8LT7
} ;,<r|.6U
ay=KfY5
public static interface Sort { <\E"clZI
public void sort(int[] data); f-vZ2+HP
} O|HIO&M
f0/jwfL
public static void swap(int[] data, int i, int j) { 7bA4P*
int temp = data; o9_(DJ<{
data = data[j]; \Y51KB\
data[j] = temp; I~d#p ]>
} F9Ifw><XM
} nu;}S!J