[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; _*tU.x|DP
} 5=;LHS*
int i1=l; SJseP_-
int i2=mid+1; %l4;-x<e
for(int cur=l;cur<=r;cur++){ zmA]@'j
if(i1==mid+1) iy<|<*s2D
data[cur]=temp[i2++]; (-<s[VnXP
else if(i2>r) U(d K
data[cur]=temp[i1++]; {Xw6]d
else if(temp[i1] data[cur]=temp[i1++]; 11'^JmKA
else &dH[lB
data[cur]=temp[i2++]; a#huK~$~
} $;4y2?E
} @3^D[
>)Udb//
} $ \yZ;Z:
uwL^Tq}Yh
改进后的归并排序: }?\8%hK"a7
%>z4hH,
package org.rut.util.algorithm.support; +:IwP
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import org.rut.util.algorithm.SortUtil; ;+Dq3NE
L:.z FW,
/** 9wTN*y
* @author treeroot Z!/!4(Fh
* @since 2006-2-2 P&>!B,f
* @version 1.0 Jbv[Ql#
*/ azs lNL
public class ImprovedMergeSort implements SortUtil.Sort { ?Z0NHy;5
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private static final int THRESHOLD = 10; /wR,P
iL$~d@AEn
/* {4y#+[
* (non-Javadoc) >=6 j:
* H@'f=Y*D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '^{:HR#i
*/ X([8TR
public void sort(int[] data) { /<R[X>]<F
int[] temp=new int[data.length]; /q^\g4J
mergeSort(data,temp,0,data.length-1); A6?!BB=]
} 9n#lDL O
Q}cti/
private void mergeSort(int[] data, int[] temp, int l, int r) { N|%r5%
int i, j, k; 6=qC/1,l
int mid = (l + r) / 2; X|&H2y|*7
if (l == r) n^b CrvD
return; a47e
if ((mid - l) >= THRESHOLD) 4GH&u,
mergeSort(data, temp, l, mid); cucmn*o?
else >&ZlCE
insertSort(data, l, mid - l + 1); )Gk?x$pY@
if ((r - mid) > THRESHOLD) Bp@\p)P(
mergeSort(data, temp, mid + 1, r); ~d3@x\I?
else q/Vl>t
insertSort(data, mid + 1, r - mid); <lNNT6[/r
O}(sn
for (i = l; i <= mid; i++) { <6s@eare8
temp = data; w^=(:`
} t: oQHhO?
for (j = 1; j <= r - mid; j++) { {'[VL;k
temp[r - j + 1] = data[j + mid]; =v'Aub
} )_OGt[_H
int a = temp[l]; pQ!lY
int b = temp[r]; KeB??1S
for (i = l, j = r, k = l; k <= r; k++) { 'U*#71S
if (a < b) { )Vrp<"v
data[k] = temp[i++]; Q`NdsS2
a = temp; ,qo^G0XO
} else { 5`$!s17
data[k] = temp[j--]; mP/#hwzB&q
b = temp[j]; (+0(A777M
} p|NY.N
} -T i<H9OV
} P-$ ,
<RpTk*Yo^=
/** $}0!dR2
* @param data e@;'#t
* @param l BlZB8KI~
* @param i 7[uN;B#V
*/ 'h7x@[|
private void insertSort(int[] data, int start, int len) { k.2GIc:5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tQYV4h\Qj
} 7E#h(bt j
} :Ny[?jtc
} "EA =auN{
} ?'|GGtvm
E2t&@t%W
堆排序： cH$(*k9%M
WNb2"W
package org.rut.util.algorithm.support; `B&=ya|bl
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import org.rut.util.algorithm.SortUtil; CB,2BTtRE
dZ8ldpf8
/** US^%pd
* @author treeroot KKb7dZbt<
* @since 2006-2-2 hO{&bY0
* @version 1.0 ?u;m ],w!
*/ #8 ^b]
public class HeapSort implements SortUtil.Sort{ v _:KqdmO]
*GY8#Az
/* (non-Javadoc) (UhJ Pco"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~% t'}JDZ
*/ rZ5xQ#IA
public void sort(int[] data) { 'vu]b#l3
MaxHeap h=new MaxHeap(); ^'du@XCf}
h.init(data); JUj.:n2e
for(int i=0;i h.remove(); F|/6;&*?M
System.arraycopy(h.queue,1,data,0,data.length); R]Z#VnL@qz
} nT2b"wkTT
Nu3IYS5&
private static class MaxHeap{ ]bmf}&
&iq'V*+-\
void init(int[] data){ 4M|C>My
this.queue=new int[data.length+1]; :w Y%=
for(int i=0;i queue[++size]=data; /.rj\,
fixUp(size); _A& [rBm|
} n9 FA`e
} 7J`v#
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private int size=0; ])bgUH
&'i>d&
private int[] queue; \L$]2"/v-
_*[vKS A&
public int get() { lx0BKD?n
return queue[1]; ;14Q@yrZ0
} =B'Yx
|0>rojMq
public void remove() { $sb@*K}:4
SortUtil.swap(queue,1,size--); q o-|.I
fixDown(1); LkK[,Qj
} C~K/yLCAi
file://fixdown xiQc\k$
private void fixDown(int k) { vl}}h%BC
int j; <nV3`L&]
while ((j = k << 1) <= size) { UUtSme
if (j < size %26amp;%26amp; queue[j] j++; vO"E4s
if (queue[k]>queue[j]) file://不用交换 ]SL+ZT
break; 0$Zh4Y
SortUtil.swap(queue,j,k); -Gl!W`$I`
k = j; =%>E8)Jb
} \k6OP
} Bd;EI)JT
private void fixUp(int k) { v$q\3#5|'
while (k > 1) { VC Ay~,
int j = k >> 1; JJM!pD\h
if (queue[j]>queue[k]) JlE+CAny
break; ZD$I-33W
SortUtil.swap(queue,j,k); nSZp,?^
k = j; 9WQ'"wyAQ
} ov\%*z2=
} ww%4MHPp8
4 BNbS|?vV
} +, rm
1. Q"<[M
} @}+B%R
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SortUtil： ~+RrL,t#
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package org.rut.util.algorithm; A9[D.W9>
cyL|.2,
import org.rut.util.algorithm.support.BubbleSort; 9N) Ea:N
import org.rut.util.algorithm.support.HeapSort; uIJ zz4
import org.rut.util.algorithm.support.ImprovedMergeSort; f|yq~3x)
import org.rut.util.algorithm.support.ImprovedQuickSort; ,p..h+l
import org.rut.util.algorithm.support.InsertSort; ry* 9
import org.rut.util.algorithm.support.MergeSort; ??P3gA
import org.rut.util.algorithm.support.QuickSort; 5(Xq58nhxI
import org.rut.util.algorithm.support.SelectionSort; V0F1X s`
import org.rut.util.algorithm.support.ShellSort; i.ivHV~-
|l?*' =
/** 2qKAO/_O
* @author treeroot eN<?rVZl
* @since 2006-2-2 f_QZql
* @version 1.0 h#|Ac>fz
*/ gGbqXG^
public class SortUtil { uv7tbI"r
public final static int INSERT = 1; #Z_f/@b
public final static int BUBBLE = 2; 9v}vCg
public final static int SELECTION = 3; f{D~ZC.*
public final static int SHELL = 4; 6~8dMy;w
public final static int QUICK = 5; tZD^<Q7}\
public final static int IMPROVED_QUICK = 6; M;@/697G
public final static int MERGE = 7; 6wyhL-{:
public final static int IMPROVED_MERGE = 8; @#5?tk0
public final static int HEAP = 9; x^UAtKSy
45Q#6BtE
public static void sort(int[] data) { I{u+=0^Y
sort(data, IMPROVED_QUICK); @'?7au ''
} -$y/*'
private static String[] name={ 3W?H^1t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {=E,.%8
}; e= _7Q.cn
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private static Sort[] impl=new Sort[]{ 6J\A%i
new InsertSort(), Q .cL1uHc
new BubbleSort(), brt`oR
new SelectionSort(), 6 Zv~c(
new ShellSort(), :}fIu?hCA
new QuickSort(), 4:XVu
new ImprovedQuickSort(), 'ewVn1ME[
new MergeSort(), p/&s-GF
new ImprovedMergeSort(), Jd/XEs?<q
new HeapSort() 0Y ld!L
}; ? `#
n'Z5rXg
public static String toString(int algorithm){ }kb6;4>c
return name[algorithm-1]; ~C;gEE-
} \>|:URnD
w<=-n;2
public static void sort(int[] data, int algorithm) { l#%G~c8x
impl[algorithm-1].sort(data); ndB*^nT
} CKRnkTTiV
W q>qso
public static interface Sort { 1ba* U~OEg
public void sort(int[] data); CjlA"_!%E
} 6ALUd^
}h_= n>
public static void swap(int[] data, int i, int j) { &$E.rgtg
int temp = data; bjGQ04da
data = data[j]; AoN|&o
data[j] = temp; W&Gt^5
} "+KAYsVtU
} 7 `& NB]