[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; # G0jMQ
} tE/j3
int i1=l; yOxJx7uD
int i2=mid+1; zQV$!%qR
for(int cur=l;cur<=r;cur++){ ?tQUZO
if(i1==mid+1) "AS;\-Jk
data[cur]=temp[i2++]; /Uz2.Ua=
else if(i2>r) S/"-x{Gc2v
data[cur]=temp[i1++]; ,3qi]fFLMe
else if(temp[i1] data[cur]=temp[i1++]; "9Sxj
else *+vS f7
data[cur]=temp[i2++]; /NNe/7'l
} D"El6<3)h
} 5YQ4]/h
A?06fo,
} &$ia#j{l
w[qWr@
改进后的归并排序: wwF]+w%lOw
wv #1s3
package org.rut.util.algorithm.support; u0^GB9q
M@[{j
import org.rut.util.algorithm.SortUtil; 7N+No.vR.
uZ&,tH/
/** Ia*eb%HG
* @author treeroot 8B"jvrs
* @since 2006-2-2 ~T|?!zML
* @version 1.0 JM0'V0z
*/ WJ9Jj69
public class ImprovedMergeSort implements SortUtil.Sort { l'fUa
S^]i
private static final int THRESHOLD = 10; H5j~<@STC
.Vj;[p8
/* FZ DC?
* (non-Javadoc) M\BLuD
* 'QFf 7A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P ^R224R
*/ U<|kA(5
public void sort(int[] data) { ]O3[Te
int[] temp=new int[data.length]; (y7U}Sb'
mergeSort(data,temp,0,data.length-1); SWvy<f4<
} <v&>&;>3
7rw}q~CE5
private void mergeSort(int[] data, int[] temp, int l, int r) { ;]3Tuq
int i, j, k; !n~p?joJ*
int mid = (l + r) / 2; 3rhH0{
if (l == r) m*tmmP4R
return; Y-hGHnh]'
if ((mid - l) >= THRESHOLD) Gdq_T*
mergeSort(data, temp, l, mid); GxL5yeN@(
else #uVH~P5TM
insertSort(data, l, mid - l + 1); `%EMhk
if ((r - mid) > THRESHOLD) 6H\3
mergeSort(data, temp, mid + 1, r); id8a#&t]
else nyD(G=Q5
insertSort(data, mid + 1, r - mid); =ltT6of@o
]e@'9`G-'
for (i = l; i <= mid; i++) { P(8zJk6h),
temp = data; *D!$gfa
} *aT3L#0(
for (j = 1; j <= r - mid; j++) { zpx
temp[r - j + 1] = data[j + mid]; ~,Ck
} zFmoo4P/
int a = temp[l]; ]fg?)z-Z
int b = temp[r]; r%A-
for (i = l, j = r, k = l; k <= r; k++) { ; 6Js
if (a < b) { U@x5cw:
data[k] = temp[i++]; @6w\q?.s
a = temp; v@TP_Ka
} else { Wg9q_Ql
data[k] = temp[j--]; D6@c&
b = temp[j]; ZNNgi@6>
} T|`nw_0
} WQv%57+
} &$ZJfHD@
_PZGns,u
/** Xn^gxOPM
* @param data 9E~=/Q=
* @param l a[bu{Z]%
* @param i GY%lPp
*/ NPF"_[RoeV
private void insertSort(int[] data, int start, int len) { ('QfB<4H1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0+p <Jc!
} `3m7b!0k
} qKag'0e
} "u:5
} ' ^L|}e
f-&4x_5
堆排序： w'E&w)Z]
UPQ?vh2F2
package org.rut.util.algorithm.support; Y3^UJe7E
|X@ZM
import org.rut.util.algorithm.SortUtil; g.$a]pZz
[S;ceORx
/** 5'>DvCp%M
* @author treeroot 5nC#<EE
* @since 2006-2-2 1 ~fD:
* @version 1.0 If[4]-dq
*/ Q'D%?Vg'
public class HeapSort implements SortUtil.Sort{ NH+?7rf8
4+Aht]$hC
/* (non-Javadoc) mX2i^.zH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;>YLL}]j
*/ _M[@a6?
public void sort(int[] data) { +P YX.
MaxHeap h=new MaxHeap(); .=@xTJh
h.init(data); }t5-%&gBY0
for(int i=0;i h.remove(); jD]Ci#|W
System.arraycopy(h.queue,1,data,0,data.length); tgk] sQY
} oihn`DY{
o%Ubn*
private static class MaxHeap{ ePF)wl;m
v0psth?qV
void init(int[] data){ /Mq9~oC
this.queue=new int[data.length+1]; (@wgNA-P
for(int i=0;i queue[++size]=data; rvPY
fixUp(size); -lICoRO#
} ~@Yiwp\"
} \0bao<
\_GG6
private int size=0; XR2Gw4]
s0EF{2<F
private int[] queue; zoh%^8?o
]{sx#|_S
public int get() { 0<ze'FbV]
return queue[1]; >aw`kr
} (}!xO?NA(
d`eX_]Z
public void remove() { VPC7Dh%.
SortUtil.swap(queue,1,size--); MZ$x(Vcj
fixDown(1); N+0[p@0
} D^m`&asC
file://fixdown A[7\!bq5
private void fixDown(int k) { $%:=;1Jl
int j; )s-[d_g
while ((j = k << 1) <= size) { FqWW[Bgd
if (j < size %26amp;%26amp; queue[j] j++; FGRdA^`
if (queue[k]>queue[j]) file://不用交换 4DwQ7KX
break; 0pfgE=9
SortUtil.swap(queue,j,k); z*oeho
k = j; Xh5&J9pw
} EOj.Jrs~
} o&U'zaj
private void fixUp(int k) { )G+D6s23
while (k > 1) { jV 'u*2&9
int j = k >> 1; %tK^&rw%
if (queue[j]>queue[k]) `T#Jiq E
break; #TUuk
SortUtil.swap(queue,j,k); .`ZuUr
k = j; 4{v?<x8
} Vb57B.I
} 5$PDA*]9
vB?(|
} evQk,;pIm
[<nmJ-V
} C CDO8
cVYPPal
SortUtil： }+/F?_I= %
R9q9cBi3
package org.rut.util.algorithm; y 1I(^<qO=
8 *Y(wqH
import org.rut.util.algorithm.support.BubbleSort; HKXtS>7d
import org.rut.util.algorithm.support.HeapSort; h 7/wkv\y9
import org.rut.util.algorithm.support.ImprovedMergeSort; O>c2*9PM
import org.rut.util.algorithm.support.ImprovedQuickSort; FgnS+c3W(
import org.rut.util.algorithm.support.InsertSort; F2^qf
import org.rut.util.algorithm.support.MergeSort; (~Hwq:=.
import org.rut.util.algorithm.support.QuickSort; <)]j;Tl
import org.rut.util.algorithm.support.SelectionSort; o4qB0h
import org.rut.util.algorithm.support.ShellSort; .-mlV ^
9Od|R"aS|
/** qDK\MQ!
* @author treeroot )e?6 Ncy
* @since 2006-2-2 L?&Trq7i
* @version 1.0 dfR?O#JPU
*/ ?y|8bw<
public class SortUtil { CkeqK
public final static int INSERT = 1; |h 3`z
public final static int BUBBLE = 2; E]&tgZO
public final static int SELECTION = 3; #I-qL/Lm
public final static int SHELL = 4; E]gy5y
public final static int QUICK = 5; 3d;w\#?L;
public final static int IMPROVED_QUICK = 6; /4Sul*{hc
public final static int MERGE = 7; 08W^
public final static int IMPROVED_MERGE = 8; 5uAUi=XA>S
public final static int HEAP = 9; ^@-qnU lH
Y- tK
public static void sort(int[] data) { SrT=XX,
sort(data, IMPROVED_QUICK); 6xW17P
} KkPr08
private static String[] name={ /zTx+U.\I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C%QC^,KL
}; eFz!`a^dX
52v@zDY
private static Sort[] impl=new Sort[]{ A5 <T7~U
new InsertSort(), M1,1J-h
new BubbleSort(), Aw,#oG {N
new SelectionSort(), feA(Rj
new ShellSort(), ,0^9VWZV
new QuickSort(), 5cZKk/"Ad}
new ImprovedQuickSort(), KKGwMJku}
new MergeSort(), 9oA-Swc[
new ImprovedMergeSort(), ;yDXo\gm
new HeapSort() 2O+fjs
}; Y}hz UKJ
qYbPF|Y=Z
public static String toString(int algorithm){ <xaB$}R
return name[algorithm-1]; ,&aD U
} VCCG_K9'
yiAusl;
public static void sort(int[] data, int algorithm) { Zoyo:vv&
impl[algorithm-1].sort(data); jx-8%dxtZ
} &Tn7
40Z/;,wp{
public static interface Sort { - *_"ZgE
public void sort(int[] data); /e50&]2w
} Jo9!:2?
jKhj 7dR
public static void swap(int[] data, int i, int j) { ECf $
int temp = data; 7p+uHm
data = data[j]; 5imqZw
data[j] = temp; 3@^b's'S|}
} !k0t (.
} A]%hM_5s