[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; e*nT+Rp
} [ X7LV
int i1=l; +{eZ@
int i2=mid+1; mN!5JZ'2
for(int cur=l;cur<=r;cur++){ MfJs?N0
if(i1==mid+1) @Czj] t`
data[cur]=temp[i2++]; .aA8'/
else if(i2>r) 4>JDo,AWy
data[cur]=temp[i1++]; D&)w =qIu
else if(temp[i1] data[cur]=temp[i1++]; |i/Iv
else |I0O|Zdv
data[cur]=temp[i2++]; q?9x0L
} U]8 @
} Ao2m"ym
49e~/YY
} _0razNk
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改进后的归并排序: (toN??r
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package org.rut.util.algorithm.support; Q')0 T>F-
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import org.rut.util.algorithm.SortUtil; #3+-vyZm
P7X':
/** H@j D%
* @author treeroot =Wgz\uGJ
* @since 2006-2-2 #iZ%CY\
* @version 1.0 $<]G#&F
*/ W5&;PkhQ6
public class ImprovedMergeSort implements SortUtil.Sort { yjq~O~
bOY<C%;C
private static final int THRESHOLD = 10; hwon^?
i&%/]Nq
/* Gtyy^tz[
* (non-Javadoc) :(^,WOf
* n)~9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f{[]m(X;
*/ N1pw*<&
public void sort(int[] data) { m4 :|
int[] temp=new int[data.length]; GD]yP..
mergeSort(data,temp,0,data.length-1); 1=9M@r~ ^
} B\tP{}P8{
H7I&Ky
private void mergeSort(int[] data, int[] temp, int l, int r) { <c X\|dM
int i, j, k; ;q3"XLV(T[
int mid = (l + r) / 2; F5Xj}`}bq
if (l == r) +VN&kCx)
return; _a?(JzLw5
if ((mid - l) >= THRESHOLD) |k3^ eeLk
mergeSort(data, temp, l, mid); nWyn}+C-
else NDmTxW#g
insertSort(data, l, mid - l + 1); rEM#J"wF
if ((r - mid) > THRESHOLD) FA+'E
mergeSort(data, temp, mid + 1, r); Pd~{XM,yfW
else 'JjW5
insertSort(data, mid + 1, r - mid); BnB]]<gO"
F/QRgXV
for (i = l; i <= mid; i++) { ]W7e2:Hra
temp = data; V1 H3}
} @u.%z# h"1
for (j = 1; j <= r - mid; j++) { y1FE +EX[
temp[r - j + 1] = data[j + mid]; 8,l~e8&
} y\xa<!:g
int a = temp[l]; Y[8GoqE|
int b = temp[r]; qi&;2Yv
for (i = l, j = r, k = l; k <= r; k++) { BbV@ziL
if (a < b) { {zri6P+s
data[k] = temp[i++]; lV*dQwa?i
a = temp; P`HDQ/^O
} else { 6^'BhHP
data[k] = temp[j--]; 4$wn8!x2|
b = temp[j]; Jw b'5[R
} >[D(<b(U&
} V/8"@C
} *Bse3%-v
}1sFddGVt
/** '&OJ hLE
* @param data rZK;=\Ot
* @param l 4|]0%H~n6
* @param i [|&V$
*/ DC-tBbQkk
private void insertSort(int[] data, int start, int len) { 'Pm.b}p<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CBVL/pxy
} #ox&=MY
} RdirEH*H
} GjfPba4>
} 2#1G)XI
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堆排序： 0[O."9
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package org.rut.util.algorithm.support; nc.(bb),
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import org.rut.util.algorithm.SortUtil; ]m(C}}
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/** W{v{sQg
* @author treeroot NhgzU+)+
* @since 2006-2-2 l0&Y",vy
* @version 1.0 h5do?b v!
*/ RM(MCle}
public class HeapSort implements SortUtil.Sort{ U=G}@Y
L (#DVF
/* (non-Javadoc) *>#mI/#}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) naHQeX;
*/ !/qQ:k-.
public void sort(int[] data) { yG ,oSp|
MaxHeap h=new MaxHeap(); dHUcu@,
h.init(data); jMP!/t :w
for(int i=0;i h.remove(); XP|qY1
System.arraycopy(h.queue,1,data,0,data.length); yltzf #%
} wyVQV8+&>
&W|r P(
private static class MaxHeap{ 2l YA% n
;G=:>m~
void init(int[] data){ 5{esL4k
this.queue=new int[data.length+1]; 'cpO"d?{
for(int i=0;i queue[++size]=data; ]5_6m;g
fixUp(size); "+@>!U
} e+? -#
} ="<S1}.
&|%F=/VU
private int size=0; rRK^vfoJ`
)dMXn2O
private int[] queue; jb5nL`(j$
TlA*~HG<Q
public int get() { $h()%C7s
return queue[1]; ,];4+&|8kW
} [&B}{6wry
^-|yF2>`
public void remove() { |*5QFp
SortUtil.swap(queue,1,size--); -y+u0,=p.
fixDown(1); TX%W-J_
} =64%eF
file://fixdown JBCJVWUt
private void fixDown(int k) { 49;2tl;F
int j; )RFE< Qcj
while ((j = k << 1) <= size) { -T 5$l
if (j < size %26amp;%26amp; queue[j] j++; 9tt0_*UX
if (queue[k]>queue[j]) file://不用交换 .AzGPcJY
break; 5V($|3PI
SortUtil.swap(queue,j,k); FV1!IE-}-
k = j; [HV9KAoA
} SjZ?keKZ
} EXrOP]Kl
private void fixUp(int k) { AVx 0aj
while (k > 1) { yVP 1=pz_[
int j = k >> 1; _s&sA2r<
if (queue[j]>queue[k]) c[DC
break; ju@5D h
SortUtil.swap(queue,j,k); 2Y2J)5,
k = j; GkutS.2G#
} 2Y+8!4^L a
} N)0I+>, ^
yU"'h[^
} pR VL}^Rk
>UQ`@GdafR
} @rh1W$
%~ROV>&
SortUtil： ST^@7f_
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package org.rut.util.algorithm; q%/ciPgE
IIW6;jS
import org.rut.util.algorithm.support.BubbleSort; lYz$~/sd
import org.rut.util.algorithm.support.HeapSort; GsG9;6c+u
import org.rut.util.algorithm.support.ImprovedMergeSort; :<`hsKy&
import org.rut.util.algorithm.support.ImprovedQuickSort; OSvv\3=
import org.rut.util.algorithm.support.InsertSort; #$qhxYyd
import org.rut.util.algorithm.support.MergeSort; n<x NE%
import org.rut.util.algorithm.support.QuickSort; ),K!|7#h
import org.rut.util.algorithm.support.SelectionSort; r|bvpZV
import org.rut.util.algorithm.support.ShellSort; 4eOQP
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/** `_+j+
* @author treeroot jx=2^A/i2-
* @since 2006-2-2 f"0{e9O]2
* @version 1.0 -9 AI@^q
*/ Tk'YpL#U
public class SortUtil { \\qw"w9
public final static int INSERT = 1; n{~Ws^d
public final static int BUBBLE = 2; 'WUevPmt
public final static int SELECTION = 3; 7@.UkBOx
public final static int SHELL = 4; A3UC=z<y
public final static int QUICK = 5; ]0HlPP:2
public final static int IMPROVED_QUICK = 6; !50Fue^JM
public final static int MERGE = 7; 7[l "=
public final static int IMPROVED_MERGE = 8; &k5 Z|d|
public final static int HEAP = 9; t._W643~
(wNL,<%~
public static void sort(int[] data) { pvJsSX
sort(data, IMPROVED_QUICK); B=:7N;BT
} zl: 5_u=T
private static String[] name={ X9f!F2x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *Mt's[8
}; /=x) 9J
* Yr)>;^
private static Sort[] impl=new Sort[]{ ,$,6%"'"
new InsertSort(), (R*K)(Nw[
new BubbleSort(), mCFScT
new SelectionSort(), CL*i,9:NR
new ShellSort(), C?bq7kD:H
new QuickSort(), ^/wvHu[#
new ImprovedQuickSort(), 1{oq8LB
new MergeSort(), F*F U[5
new ImprovedMergeSort(), /5@V $c8
new HeapSort() :QnN7&j|(w
}; ?~e 8:/@
_|x b)_
public static String toString(int algorithm){ ?qviJDD|f
return name[algorithm-1]; `e t0i.
} P9/5M4]tt
/q4<ZS#
public static void sort(int[] data, int algorithm) { ]7C=.'Y
impl[algorithm-1].sort(data); ).TQYrs
} ~+{OSx<S
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public static interface Sort { Tp.0@aC
public void sort(int[] data); r00 fvZyK
} k0{5)Su"xr
*5k" v"NM(
public static void swap(int[] data, int i, int j) { ZM/*cA!"
int temp = data; 'aQ"&GX@
data = data[j]; NhyVX%qt:
data[j] = temp; <im BFw
} yz}Agc4.I
} F:.rb Ei