[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; |{V@t1`
} 7&w$@zs87
int i1=l; K.r "KxCm|
int i2=mid+1; BRTCo,i
for(int cur=l;cur<=r;cur++){ =QS%D*.|D
if(i1==mid+1) ocPM zq-
data[cur]=temp[i2++]; IrMxdF~c
else if(i2>r) S pIdw0
data[cur]=temp[i1++]; mTgsvC
else if(temp[i1] data[cur]=temp[i1++]; 05s{Z.aK
else witx_r
data[cur]=temp[i2++]; Y>Ju$i
} ~sMEfY,p
} ')zf8>,
S'}pUGDO
} vR*p1Kq:
y#v<V1b]
改进后的归并排序: {n 4W3
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package org.rut.util.algorithm.support; 'LMMo4o3
nh*hw[Ord
import org.rut.util.algorithm.SortUtil; <*[D30<
mRT$@xa]J
/** ^{g('BQx
* @author treeroot "Ta"5XW
* @since 2006-2-2 iCIU'yI
* @version 1.0 Ye]-RN/W
*/ lN~u='Kc
public class ImprovedMergeSort implements SortUtil.Sort { z$Z{ LR
Jk}Dj0o
private static final int THRESHOLD = 10; D* QZR;D#.
p5`={'>-
/* 7u<C&Z/
* (non-Javadoc) wu~?P`
* LXS)(-&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ICD;a
*/ -jk-ve
public void sort(int[] data) { /pQUu(~h_
int[] temp=new int[data.length]; ,d@FO|G#pt
mergeSort(data,temp,0,data.length-1); XOT|:
} H>Q X?>j
+j(7.6ia
private void mergeSort(int[] data, int[] temp, int l, int r) { >SWc
int i, j, k; r^T+I3
int mid = (l + r) / 2; =-E%vnU
if (l == r) jL,P )TC
return; 9a$ 7$4m
if ((mid - l) >= THRESHOLD) cceh`s=cU
mergeSort(data, temp, l, mid); "U|u-ka8B
else :wY(</H
insertSort(data, l, mid - l + 1); v{;^>"5o
if ((r - mid) > THRESHOLD) P2fiK
mergeSort(data, temp, mid + 1, r); Kr%w"$<
else J936o3F_
insertSort(data, mid + 1, r - mid); tJII-\3"
EI8KKo *
for (i = l; i <= mid; i++) { :=?od 0]W
temp = data; 9s&dN
} MeDlsO
for (j = 1; j <= r - mid; j++) { CPci 'SO
temp[r - j + 1] = data[j + mid]; g_;4@jwTP"
} :vJ1Fo!
int a = temp[l]; FJ] ?45
int b = temp[r]; cCv@fks
for (i = l, j = r, k = l; k <= r; k++) { "R^0eNv$
if (a < b) { v,Uu)Z
data[k] = temp[i++]; UTVqoCHA
a = temp; UO4z~
} else { #n.XOet<\
data[k] = temp[j--]; ",pd 9
b = temp[j]; *:"p*qV*
} 4uE|$
} iC4rzgq
} 0aa&13!5
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/** Vc!'=&*
* @param data wxE'h~+
* @param l NX8. \Pf#
* @param i >D_!d@Z
*/ Q(jIqY1Hf
private void insertSort(int[] data, int start, int len) { :aR_f`KMm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k-I U}|Xz
} \[<8AV"E-'
} L0>7v
} WZN0`Od
} <lP5}F87
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堆排序： p%-;hL!
wUKt$_]``
package org.rut.util.algorithm.support; ;8g[y"I
2#X>^LH
import org.rut.util.algorithm.SortUtil; D2'J(
U*\1d
/** Zp+orc7
* @author treeroot {w mP
* @since 2006-2-2 9`cj9zz7
* @version 1.0 C:p`
*/ 6ag0c&k
public class HeapSort implements SortUtil.Sort{ ~\u~>mtchu
9#1Jie$
/* (non-Javadoc) G8lTIs4u;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l4AXjq2
*/ WO=P~F<
public void sort(int[] data) { C ett*jm_
MaxHeap h=new MaxHeap(); og`g]Z<I
h.init(data); T/P
for(int i=0;i h.remove(); !SThK8j$7
System.arraycopy(h.queue,1,data,0,data.length); $|VD+[jSV
} '5\?l:z
=\gK<Xh
private static class MaxHeap{ mw*KLMo42
zKFiCP K
void init(int[] data){ q OV$4[r
this.queue=new int[data.length+1]; VLC=>w\,
for(int i=0;i queue[++size]=data; rTzXRMv@o
fixUp(size); T1c&3
} emG1Wyl
} w_*$wVl
O +Xu?W]
private int size=0; |`O210B@
EO\- J-nM
private int[] queue; & sgzSX
H={5>;8G
public int get() { 0}-MWbG
return queue[1]; RY]jY | E
} qU^`fIa
B6U4>ZN
public void remove() { Q#pgl
SortUtil.swap(queue,1,size--); J:l%
fixDown(1); IYe,VL
} scyv]5Hm!
file://fixdown ; g\rY
private void fixDown(int k) { {i)FDdDGD
int j; ^t P|8k
while ((j = k << 1) <= size) { KQCF "
if (j < size %26amp;%26amp; queue[j] j++; &X)^G#
if (queue[k]>queue[j]) file://不用交换 <AB({(
break; 5 ~YaXh^
SortUtil.swap(queue,j,k); HjT-5>I7f
k = j; aPHNX)
} sM@1Qyv&0
} c.uD%
private void fixUp(int k) { xd!GRJ<I
while (k > 1) { "(yw(/
int j = k >> 1; p5#UH
if (queue[j]>queue[k]) E2Ec`o
break; v dPb-z4
SortUtil.swap(queue,j,k); s}?QA cC
k = j; 8[x{]l[
} rGQY
} v4r%'bA
ms#|Yl1/|
} I]Vkaf I>(
r^`~GG!,Q
} _^p\ u
"T.Qb/97@
SortUtil： @UW*o&pGqL
(#rhD}
package org.rut.util.algorithm; U?j[ 8z
c Sktm&SP
import org.rut.util.algorithm.support.BubbleSort; 4)d"}j
import org.rut.util.algorithm.support.HeapSort; +krDmU9(
import org.rut.util.algorithm.support.ImprovedMergeSort; [N0"mE<
import org.rut.util.algorithm.support.ImprovedQuickSort; (4IH%Ez){
import org.rut.util.algorithm.support.InsertSort; A5,(P$@k
import org.rut.util.algorithm.support.MergeSort; s[}cj+0
import org.rut.util.algorithm.support.QuickSort; afye$$X
import org.rut.util.algorithm.support.SelectionSort; ?;DzWCL~9
import org.rut.util.algorithm.support.ShellSort; hzrS_v
l:j>d^V*&x
/** B1 xlWdm
* @author treeroot {$'oKJy*
* @since 2006-2-2 dyt.(2
* @version 1.0 )pw53,7>aN
*/ ,Ofou8C6
public class SortUtil { Cg]S`R-
public final static int INSERT = 1; v(^;%
public final static int BUBBLE = 2; &W N R{
public final static int SELECTION = 3; iM~qSRb#mJ
public final static int SHELL = 4; #yOn /
public final static int QUICK = 5; f&? 8fB8{
public final static int IMPROVED_QUICK = 6; S~V?Qe@&Z
public final static int MERGE = 7; Im@Yx^gc
public final static int IMPROVED_MERGE = 8; g4GU28l
public final static int HEAP = 9; N.-*ig.YR7
Zi.w+V
public static void sort(int[] data) { [~k!wipK
sort(data, IMPROVED_QUICK); C0;:")6~
} \+)AQ!E
private static String[] name={ x%55:8{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tF!-}{c"k
}; ZvSEa{
6bUcrw/# p
private static Sort[] impl=new Sort[]{ :CG;:( |
new InsertSort(), 43N=OFU
new BubbleSort(), kV$VKag*A
new SelectionSort(), DhT8Kh{
new ShellSort(), -{Fy@$!
new QuickSort(), #z9@x}p5g
new ImprovedQuickSort(), 1V;,ZGI*
new MergeSort(), ]9~6lx3/
new ImprovedMergeSort(), ^2uT!<2
new HeapSort() %RXFgm!{f
}; @WP%kX.?
92M_Z1_w[
public static String toString(int algorithm){ v.Xmrry
return name[algorithm-1]; wZ/b;%I!
} [#/@v/`
qIk(ei
public static void sort(int[] data, int algorithm) { iH)-8Q
impl[algorithm-1].sort(data); 1p(9hVA
} n@9R|biO
z`Xc] cPi
public static interface Sort { _OJ19Ry
public void sort(int[] data); 0-8'.C1v
} xcQ:&q
n(jrK9]
public static void swap(int[] data, int i, int j) { s^GE>rf
int temp = data; Pi=B\=gs
data = data[j]; >{#QS"J#
data[j] = temp; 2UEjn>2
} &Tk@2<5=
} @!%HEs!# #