[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; K 8O|?x]
} 8P`"M#fI
int i1=l; e3\T)x&=
int i2=mid+1; \U_@S.
for(int cur=l;cur<=r;cur++){ `]aeI'[}R
if(i1==mid+1) x)&\z}
data[cur]=temp[i2++]; 6eCCmIdaM
else if(i2>r) vDvFL<`vmD
data[cur]=temp[i1++]; =(^3}x
else if(temp[i1] data[cur]=temp[i1++]; |W^IlqTH
else jEwIn1
data[cur]=temp[i2++]; khd4ue$
} 7HWmCaa[
} 6LhTBV
)/P}?`I
} Ys7]B9/1O
]$hBMuUa
改进后的归并排序: *1"+%Z^
O.M1@w]
package org.rut.util.algorithm.support; dr"1s-D4IQ
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import org.rut.util.algorithm.SortUtil; 7 8,n%=nG
VU#7%ufu&
/** !@sUj
* @author treeroot gM]:Ma
* @since 2006-2-2 1;iUWU1@
* @version 1.0 l-3~K-k<@
*/ {`_i`
public class ImprovedMergeSort implements SortUtil.Sort { *WZA9G#V5
\7_y%HR
private static final int THRESHOLD = 10; n"8Yv~v*2j
SrJE_~i
/* C#pjmT_
* (non-Javadoc) i~72bMwsA
* ,: ^u-b|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A}w/OA97RO
*/ 3c%caK
public void sort(int[] data) { |BYRe1l6l
int[] temp=new int[data.length]; QWU-m{@~&
mergeSort(data,temp,0,data.length-1); 'fW-Y!k%
} xx $cnG
g{LP7D;6
private void mergeSort(int[] data, int[] temp, int l, int r) { YZ7.1`8
int i, j, k; _dU\JD
int mid = (l + r) / 2; 3XKf!P
if (l == r) "jCu6Rjd
return; r<\u6jF
if ((mid - l) >= THRESHOLD) D'4\*4is
mergeSort(data, temp, l, mid); $Q0n
else *ui</+
insertSort(data, l, mid - l + 1); n@w%Zl
if ((r - mid) > THRESHOLD) h];I{crh
mergeSort(data, temp, mid + 1, r); '>" 4
else V8(-
insertSort(data, mid + 1, r - mid); =H~j,K
>3bCTE
for (i = l; i <= mid; i++) { w =KPT''!
temp = data; p[cX O=
} Gh$^{
for (j = 1; j <= r - mid; j++) { _B0L.eF
temp[r - j + 1] = data[j + mid]; Pc9H0\+Xk
} <GsuZ
int a = temp[l]; r*Xuj=
int b = temp[r]; SX*RP;vHy
for (i = l, j = r, k = l; k <= r; k++) { OJxl<Q=z
if (a < b) { z)"=:o7
data[k] = temp[i++]; "5 A!jq
a = temp; t&p|Ynz?i
} else { KmF]\:sMD
data[k] = temp[j--]; m kexc~l
b = temp[j]; #/]nxW.S
} ElXFeJ%[G
} ~5g~;f[4
} YK\X+"lB
x"~JR\yzKJ
/** j<x_&1
* @param data O@P"MXEG
* @param l /j^
* @param i #1[u(<AS
*/ 2?x4vI np;
private void insertSort(int[] data, int start, int len) { Yw9GN2AG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [gB+C84%%
} _Y!IEAU/#
} Q20%"&Xp]
} ~m |BC*)
} Z}QB.$&
>V~E]P%@
堆排序： a =QCp4^
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package org.rut.util.algorithm.support; 4Up/p&1@
MPV5P^@X
import org.rut.util.algorithm.SortUtil; m2o0y++TjW
9gFUaDLo
/** XRH!]!
* @author treeroot *or(1DXP8
* @since 2006-2-2 OCUr{Nh
* @version 1.0 vbNBLCwug
*/ _LPHPj^Pg
public class HeapSort implements SortUtil.Sort{ 8RX&k
OH88n69
/* (non-Javadoc) P%6~&woF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <!+Az,-
*/ `g,..Ns-r
public void sort(int[] data) { hj:,S|
MaxHeap h=new MaxHeap(); H.c7Nle
h.init(data); R2;
for(int i=0;i h.remove(); zTp"AuNHN
System.arraycopy(h.queue,1,data,0,data.length); KP"+e:a%
} g :OI
P3%5?.S
private static class MaxHeap{ sS Mh`4'
?(PKeq6
void init(int[] data){ 9z0p5)]n>
this.queue=new int[data.length+1]; \lY_~*J
for(int i=0;i queue[++size]=data; ebq4g387X
fixUp(size); GeqPRah
} !W\+#ez
} C+]I@Go'Tk
dveiQ
private int size=0; ; KA~Z5x;
z{6Z 11|
private int[] queue; omFz@
D@KlOU{<
public int get() { q| 7(
return queue[1]; K'xV;r7Nt
} BWNi [^]
(BM47D=v
public void remove() { CAlCDfKW}
SortUtil.swap(queue,1,size--); QWU[@2@%r
fixDown(1); i@q&5;%%
} =*Lfl'sr_
file://fixdown Q/?$x*\>
private void fixDown(int k) { ^pS~Z~[d/
int j; }b}m3i1
while ((j = k << 1) <= size) { g7|@
if (j < size %26amp;%26amp; queue[j] j++; b$7 +;I;
if (queue[k]>queue[j]) file://不用交换 [WJ+h~~ o
break; Zfw,7am/
SortUtil.swap(queue,j,k); N#]ypl
k = j; "7 yD0T)2
} `XKLU
} 2eogY#
private void fixUp(int k) { m'U0'}Ld};
while (k > 1) { y7{?Ip4[
int j = k >> 1; RFGffA&
if (queue[j]>queue[k]) "4Nt\WQ
break; ^ 9sjj
SortUtil.swap(queue,j,k); +3gp%`c4
k = j; 4| f*eO
} iscz}E,Y
} TC('H[ ]
b>W%t
} l{9Y
9sP0D
} U:`Kss`
=|=(l)8
SortUtil： hp2t"t
9$t(&z=
package org.rut.util.algorithm; GyIV Hby
D9df=lv mD
import org.rut.util.algorithm.support.BubbleSort; +vH4MwG$.&
import org.rut.util.algorithm.support.HeapSort; 1oS/`)
import org.rut.util.algorithm.support.ImprovedMergeSort; _t$sgz&
import org.rut.util.algorithm.support.ImprovedQuickSort; {ax:RUQxy
import org.rut.util.algorithm.support.InsertSort; Z;i:](
import org.rut.util.algorithm.support.MergeSort; \zY!qpX<
import org.rut.util.algorithm.support.QuickSort; x:;kSh
import org.rut.util.algorithm.support.SelectionSort; sB</DS
import org.rut.util.algorithm.support.ShellSort; ig!+2g
:h$$J lP
/** eRYK3W
* @author treeroot Wzh`or
* @since 2006-2-2 yfSmDPh
* @version 1.0 osRy e3
*/ 6<]lW
public class SortUtil { =(Mch~
public final static int INSERT = 1; 3mgD(,(^
public final static int BUBBLE = 2; uD'6mk*
public final static int SELECTION = 3; Wri<h:1
public final static int SHELL = 4; Sf'CN8
public final static int QUICK = 5; x4 yR8n(
public final static int IMPROVED_QUICK = 6; 8r{.jFGv
public final static int MERGE = 7; O?2DQY?jT
public final static int IMPROVED_MERGE = 8; tYS06P^<
public final static int HEAP = 9; *T/']t
*p U x8yB
public static void sort(int[] data) { JI}'dU>*U:
sort(data, IMPROVED_QUICK); y0#2m6u
} %Zi} MPx
private static String[] name={ M-71 1|eGI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fex@,I&
}; \e;iT\=.(
Upe%rC(
private static Sort[] impl=new Sort[]{ $mILoy B,
new InsertSort(), \dVOwr
new BubbleSort(), >A= f1DF
new SelectionSort(), GJrG~T
new ShellSort(), iMlWM-wz>O
new QuickSort(), #mF"1QW
new ImprovedQuickSort(), uFE)17E
new MergeSort(), U6K|fYN`
new ImprovedMergeSort(), 1#x0q:6
new HeapSort() XSRsGTCC=
}; w<#!h6Y=
f#;>g
public static String toString(int algorithm){ @dKTx#gZ
return name[algorithm-1]; V88p;K$+
} LoV<:|GTI
ax`o>_)
public static void sort(int[] data, int algorithm) { 9w"*y#_
impl[algorithm-1].sort(data); ^('wy};
} TOt dUO
D7Z /H'|
public static interface Sort { ]gOy(\B
public void sort(int[] data); 1Mzmg[L8
} =bOW~0Z1
-RwE%cr
public static void swap(int[] data, int i, int j) { zCZf%ATq
int temp = data; %J(:ADu]
data = data[j]; e6*8K@LHB
data[j] = temp; G{}VPcrbC
} FPz9N@M%Q
} V gWRW7Se