[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; \4Z"s[8}
} EfqC_,J*3
int i1=l; 4\y>pXML-U
int i2=mid+1; DAQozhP8
for(int cur=l;cur<=r;cur++){ [E;~Y_l
if(i1==mid+1) ;Swj`'7
data[cur]=temp[i2++]; Voo_ ?
else if(i2>r) N{?Qkkgx
data[cur]=temp[i1++]; ,U=7#Cf!
else if(temp[i1] data[cur]=temp[i1++]; 1?{w~cF}
else !yu-MpeG
data[cur]=temp[i2++]; zTg&W7oz
} %B(E;t63W
} K}8wCS F
J<-2dvq
} T1M>N
B&?xq)%*#
改进后的归并排序: 9&Ny;oy#6
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package org.rut.util.algorithm.support; T;#:Y
FB n . 4
import org.rut.util.algorithm.SortUtil; Am=O-; b'8
I 8 Ls_$[
/** `! _mIh}
* @author treeroot X;d 1@G
* @since 2006-2-2 vg\fBHzn
* @version 1.0 oB%j3aAH
*/ M7c53fz
public class ImprovedMergeSort implements SortUtil.Sort { .83z =
k@Bn}r
private static final int THRESHOLD = 10; #R#|hw
9iN}v
/* N[wyi&m4
* (non-Javadoc) oD_#oX5\
* ;_E][m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rip[
*/ PjkjUP
public void sort(int[] data) { cWp5pGIzfp
int[] temp=new int[data.length]; =z9FjK
mergeSort(data,temp,0,data.length-1); 1G 63eH)!
} %$=}ePD
3`{[T17
private void mergeSort(int[] data, int[] temp, int l, int r) { K!;>/3Y2-
int i, j, k; Kbcr-89Gv~
int mid = (l + r) / 2; O>>%lr|
if (l == r) 2x:aMWh
return; 9On(b|mT
if ((mid - l) >= THRESHOLD) ICUI0/J
mergeSort(data, temp, l, mid); ;w^{PZBg
else 0]2@T=*kTY
insertSort(data, l, mid - l + 1); *7K)J8kq
if ((r - mid) > THRESHOLD) 1VB{dgr
mergeSort(data, temp, mid + 1, r); aKw7m={
else /^b=| +Do
insertSort(data, mid + 1, r - mid); +Ec@qP R&
e! 0Y`lQ
for (i = l; i <= mid; i++) { R![1\Yv&
temp = data; o&kgRv[
} Rs53R$PIR
for (j = 1; j <= r - mid; j++) { +6\1 d5
temp[r - j + 1] = data[j + mid]; 9`5qVM1O{
} qWw{c&{Q],
int a = temp[l]; O],]\M{GL
int b = temp[r]; 7-[^0qS
for (i = l, j = r, k = l; k <= r; k++) { U&L?IT=x
if (a < b) { UE K$
data[k] = temp[i++]; v v]rXJu1
a = temp; GKf%dKL
} else { tkf^sGgNO
data[k] = temp[j--]; *Zz hN]1
b = temp[j]; LAv!s/O$=
} Awlw6?
} 5db9C}0
} S3&lkN5
Tw!_=zy(Gw
/** TbR!u:J
* @param data ui1h M
* @param l fC!+"g55
* @param i (zhi/>suG
*/ u;=a=>05IR
private void insertSort(int[] data, int start, int len) { xkmqf7w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q|kkdK|N/Y
} VB@M=ShKK
} kUQdi%3yY;
} NZt 8L?
} 0uS6F8x@
@ \JoICz
堆排序： Nx<%'-9)|
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package org.rut.util.algorithm.support; [TX5O\g![
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import org.rut.util.algorithm.SortUtil; ^:,I #]
"[wP1n!G
/** "yc@_+"\+
* @author treeroot qb>mUS
* @since 2006-2-2 V.~C.x
* @version 1.0 j$}W%ibj
*/ dnstm@0k
public class HeapSort implements SortUtil.Sort{ c~{)vL0K
992cy2,Fb
/* (non-Javadoc) WcKL=Z?(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ys Td'J
*/ VTwJtWnq
public void sort(int[] data) { "D.`:9sk0
MaxHeap h=new MaxHeap(); rT28q.
h.init(data); _U`1BmTC2
for(int i=0;i h.remove(); UeN+}`!l
System.arraycopy(h.queue,1,data,0,data.length); <#No t1R
} KPB^>,T2{
k)B]|,g7G0
private static class MaxHeap{ yZqX[U
{igVuZ(>en
void init(int[] data){ Evb %<`gd
this.queue=new int[data.length+1]; ewp&QH4
for(int i=0;i queue[++size]=data; Nt P=m @
fixUp(size); FOD_m&+
} Kf'oXCs
} J?84WS
`HJRXoLySW
private int size=0; 9zD^4j7
Sz'JOBp
private int[] queue; ad'C&^o5
TaE&8;H#N
public int get() { br_D Orq|
return queue[1]; G5'HrV
} yfCdK-9+B
<jHo2U8/"s
public void remove() { ~91) DNaE
SortUtil.swap(queue,1,size--); XonI
fixDown(1); B3-;]6
} DXc3u^ L
file://fixdown dMjAG7U
private void fixDown(int k) { qo62!q
int j; I.RmBUq):s
while ((j = k << 1) <= size) { WR@TH bU
if (j < size %26amp;%26amp; queue[j] j++; w} 1~
if (queue[k]>queue[j]) file://不用交换 ieG%D HN
break; pZO`18z
SortUtil.swap(queue,j,k); ^Yu%JCN8g
k = j; =RH7j
} 3( `NHS~h
} O'~;|-Z<
private void fixUp(int k) { ,]qTJ`J
while (k > 1) { gQ~X;'
int j = k >> 1; :;u?TFCRx
if (queue[j]>queue[k]) 89X`U)Ws
break; "L~qsFL
SortUtil.swap(queue,j,k); TEt+At`]
k = j; %W:]OPURK
} 8^ezqd`
} \oc*
l8Ks{(wh
} QeZK&^W
v35=4>Y
} Ht!]%
S1oP_A[|
SortUtil： =&xNdc
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package org.rut.util.algorithm; KG8Km
>)p8^jX
import org.rut.util.algorithm.support.BubbleSort; ^YwTO/Q|
import org.rut.util.algorithm.support.HeapSort; T`gR&n<D
import org.rut.util.algorithm.support.ImprovedMergeSort; XlHt(d0h
import org.rut.util.algorithm.support.ImprovedQuickSort; 1T@#gE["Ic
import org.rut.util.algorithm.support.InsertSort; o2#_CdU
import org.rut.util.algorithm.support.MergeSort; ilpP"B
import org.rut.util.algorithm.support.QuickSort; *aT\V64
import org.rut.util.algorithm.support.SelectionSort; )mF;^3
import org.rut.util.algorithm.support.ShellSort; vS_Ji<W~E
v"N%w1`.e
/** qL?`l;+
* @author treeroot |H7f@b]Sk
* @since 2006-2-2 uDXRw*rTv
* @version 1.0 y o |"-
*/ sAec*Q(R
public class SortUtil { }Uc)iNU
public final static int INSERT = 1; >p|tIST
public final static int BUBBLE = 2; j`A3N7;
public final static int SELECTION = 3; -"Hy%wE
public final static int SHELL = 4; ~v+A6N:qC
public final static int QUICK = 5; NwPC9!*
public final static int IMPROVED_QUICK = 6; smTPca)7s
public final static int MERGE = 7; hxQx$
public final static int IMPROVED_MERGE = 8; JXA!l?%
public final static int HEAP = 9; uF89B-t
236,o {9e
public static void sort(int[] data) { 8%W(",nd
sort(data, IMPROVED_QUICK); 1 /dy@'
} "ABg,^jf
private static String[] name={ MmPLJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sj& j\<(
}; [~#]p9|L
F vt5vQ
private static Sort[] impl=new Sort[]{ Q"2J2211
new InsertSort(), 9pJk.Np0
new BubbleSort(), M8HHyV[AmC
new SelectionSort(), "fTW2D74
new ShellSort(), AV%t<fDG#
new QuickSort(), ~M!s0jT
new ImprovedQuickSort(), ]= nM|e
new MergeSort(), TCI%Ox|a
new ImprovedMergeSort(), 1P[[PvkD6
new HeapSort() /3pvq%i
}; jj$D6f/mOG
EiP#xjn?c
public static String toString(int algorithm){ 1FfSqd
return name[algorithm-1]; :497]c3#5C
} pX~X{JTaL)
M~jV"OF=
public static void sort(int[] data, int algorithm) { S%t*!
impl[algorithm-1].sort(data); Q"+)xj
} [x\?._>
YLVZ]fN=>
public static interface Sort { wq@{85
public void sort(int[] data); _)U[c;^6
} U&}v1wdZ3
VQ,;~^Td
public static void swap(int[] data, int i, int j) { f;7I{Z\<
int temp = data; NplWF\5y
data = data[j]; .lt|$["
data[j] = temp; -mur`tC
} ^D.u
} ft"t