[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; }>\C{ClI
} kh<2BOV
int i1=l; F4QVAOM]U
int i2=mid+1; :jf3HG
for(int cur=l;cur<=r;cur++){ kJU2C=m@e2
if(i1==mid+1) " bG2:
data[cur]=temp[i2++]; u8^lB7!e/
else if(i2>r) G@0&8
data[cur]=temp[i1++]; V`5O{Gg
else if(temp[i1] data[cur]=temp[i1++]; +@UV?"d
else 42{~Lhxt
data[cur]=temp[i2++]; gYj'(jB
} (7Qo
} hH.G#-JO
BtZyn7a
} sW$XH1Uf#
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改进后的归并排序: u*R_\*j@
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package org.rut.util.algorithm.support; z:O8Ls^\T
pg.%Pdr<$
import org.rut.util.algorithm.SortUtil; ]e3Ax(i)
qs6aB0ln
/** iZ%yd-
* @author treeroot 9WHddDA
* @since 2006-2-2 |Tw~@kT@
* @version 1.0 AA_%<zK
*/ 7)m9"InDI
public class ImprovedMergeSort implements SortUtil.Sort { b>k y
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private static final int THRESHOLD = 10; }Z>)DN=+
`oJ [u:b
/* 2%1hdA<
* (non-Javadoc) pAEx#ck
* :k"]5>(^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dq xs+
*/ s2?&!
public void sort(int[] data) { L];b<*d
int[] temp=new int[data.length]; rQXzR
mergeSort(data,temp,0,data.length-1); |ZBw<f
} *:1ey{w:
2c}E(8e]
private void mergeSort(int[] data, int[] temp, int l, int r) { Rcv9mj]l
int i, j, k; <3iMRe
int mid = (l + r) / 2; 0(Ij%Wi,
if (l == r) $'TM0Yu,
return; a.'*G6~Qgw
if ((mid - l) >= THRESHOLD) ^.tg7%dJ
mergeSort(data, temp, l, mid); GILfbNcd
else }G=M2V<L
insertSort(data, l, mid - l + 1); 9L9sqZUB
if ((r - mid) > THRESHOLD) TC. ,V_
mergeSort(data, temp, mid + 1, r); (hsl~Jf
else )"LJ hLg
insertSort(data, mid + 1, r - mid); m|# y >4
ivPg9J1S
for (i = l; i <= mid; i++) { jpOp.
temp = data; zi:BF60]=
} 0V]s:S
for (j = 1; j <= r - mid; j++) { l%ZhA=TKQ
temp[r - j + 1] = data[j + mid]; J1kM\8%b\
} wBzC5T%,
int a = temp[l]; ToQ"Iy?
int b = temp[r]; 4 :=]<sc,
for (i = l, j = r, k = l; k <= r; k++) { a?.=V
if (a < b) { @;kSx":b
data[k] = temp[i++]; |}1dFp
a = temp; kT?J5u_o
} else { v<;Md-<
data[k] = temp[j--]; Jwp7gYZ
b = temp[j]; 'S~5"6r
} ~ 1pr~
} S'14hk<
} Qd6FH2Pl
+V+a4lU14
/** /=h` L,
* @param data zQA`/&=Y
* @param l H"KCK6
* @param i 5IN(|B0
*/ F?cK-.
private void insertSort(int[] data, int start, int len) { }Lv;!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2tLJU Z1
} eQ"E
} hcc/=_hA
} -&;TA0~;
} {!`4iiF
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堆排序： 6RM/GM
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package org.rut.util.algorithm.support; f5k6`7Vj]
=EIkD9u
import org.rut.util.algorithm.SortUtil; $N\Ja*g
mTh]PPo
/** zJXplvaL;
* @author treeroot z=FZiH
* @since 2006-2-2 .-=vx r
* @version 1.0 Tr|JYLwF
*/ *kVV+H<X|b
public class HeapSort implements SortUtil.Sort{ b\ PgVBf9
+3`alHUK
/* (non-Javadoc) [V!tVDs&'o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dd["dBIZ '
*/ 2Hdu:"j
public void sort(int[] data) { ]d`VT)~vje
MaxHeap h=new MaxHeap(); fatf*}eln
h.init(data); >MK98(F
for(int i=0;i h.remove(); 9Ee'Cm
System.arraycopy(h.queue,1,data,0,data.length); sr}E+qf
} i&k7-<
6Iw\c
private static class MaxHeap{ TKjFp%
~4"dweu?
void init(int[] data){ o.\oA6P_
this.queue=new int[data.length+1]; rbQR,Nf2x
for(int i=0;i queue[++size]=data; <1pEwI~
fixUp(size); }i2V.tVB-
} E e]-qN*8
} B;WCTMy}
q9NoI(]e
private int size=0; d1kJRJ
iCyfOh
private int[] queue; _rYkis^u
|%v^W3
public int get() { 1sCR4L:+
return queue[1]; <ih[TtZ
} -![|}pX
+*^H#|!
public void remove() { v3qA":(w+(
SortUtil.swap(queue,1,size--); b6M
fixDown(1); *'X3z@R
} v LZoa-w:
file://fixdown Wl Sm
private void fixDown(int k) { `W-Fssu
int j; N<-Gk6`C/
while ((j = k << 1) <= size) { FC*[*
if (j < size %26amp;%26amp; queue[j] j++; wAd9
if (queue[k]>queue[j]) file://不用交换 !by\9 ?n
break; kW (Bkuc)
SortUtil.swap(queue,j,k); m4g$N)
k = j; L-\GHu~)
} go"Hf_
} Ru~j,|0r4
private void fixUp(int k) { d[35d J7F
while (k > 1) { _2nx^E(pd
int j = k >> 1; ;$tSb ~K+
if (queue[j]>queue[k]) sC;+F*0g
break; ?s _5&j7
SortUtil.swap(queue,j,k); ASfaX:ke
k = j; ]~nKK@Rw
} Dxxm="FQZ
} :yjFQ9^?&
C $JmzrE
} Uwi7)
#,.Hr#3nI
} X76e&~
}T$p)"
SortUtil： f {"?%Ku#
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package org.rut.util.algorithm; @R 6@]Dm
U?=Dg1
import org.rut.util.algorithm.support.BubbleSort; 9E tz[`|
import org.rut.util.algorithm.support.HeapSort; -]=@s
import org.rut.util.algorithm.support.ImprovedMergeSort; ((I%'
import org.rut.util.algorithm.support.ImprovedQuickSort; h@h!,;
import org.rut.util.algorithm.support.InsertSort; 2Gdd*=4z
import org.rut.util.algorithm.support.MergeSort; n}V_,:Z
import org.rut.util.algorithm.support.QuickSort; `KQvJjA6
import org.rut.util.algorithm.support.SelectionSort; TU7'J
import org.rut.util.algorithm.support.ShellSort; rt|7h>RQ
^KELKv,_
/** &w~d_</
* @author treeroot F\KUZ[%
* @since 2006-2-2 ,=:D
* @version 1.0 /SrAW`;"
*/ "Yca%:
public class SortUtil { @]#1(9P
public final static int INSERT = 1; w-{c.x
public final static int BUBBLE = 2; p"Z-6m~
public final static int SELECTION = 3; eN~=*Mn(za
public final static int SHELL = 4; 3{h_&Gbo'D
public final static int QUICK = 5; !L8#@BjU
public final static int IMPROVED_QUICK = 6; $pudoAO
public final static int MERGE = 7; +KEWP\r
public final static int IMPROVED_MERGE = 8; )tpL#J
public final static int HEAP = 9; i@BtM9:
U3:j'Su4H?
public static void sort(int[] data) { [=_jYzD,j|
sort(data, IMPROVED_QUICK); 6u}</>}
} r)6M!_]AW
private static String[] name={ B~du-Z22IZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %!L9)(}"
}; Ib0ZjX6
nJLFfXWx
private static Sort[] impl=new Sort[]{ 8Bg;Kh6B
new InsertSort(), \r>6`-cs]
new BubbleSort(), k: ;WtBC6j
new SelectionSort(), jZ3fKyp#
new ShellSort(), pU7lnS[
new QuickSort(), v<:R#
new ImprovedQuickSort(), I)W`sBL
new MergeSort(), ^Va1f'g
new ImprovedMergeSort(), H$KTo/
new HeapSort() i@R 1/M
}; _\HQvH
'XBFv9&
public static String toString(int algorithm){ 3<zp
return name[algorithm-1]; * +wW(#[
} a -moI+y
2,P^n4~A?w
public static void sort(int[] data, int algorithm) { L z1ME(
impl[algorithm-1].sort(data); UOmY-\ &c
} @oad,=R&
7fX<511(
public static interface Sort { =iD3Yt
public void sort(int[] data); 9?3&?i2-
} <V6VMYXY4
wsVV$I[2
public static void swap(int[] data, int i, int j) { @{pLk4E
int temp = data; Ji 0 tQV
data = data[j]; FjI`uP
data[j] = temp; 1~QPG\cdIX
} .q3/_*
} wuJ4kW$