[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; -T>`PJpJuL
} Z.<B>MD8^
int i1=l; MX34qJ9k
int i2=mid+1; H>B:jJf
for(int cur=l;cur<=r;cur++){ sXUM,h8$!+
if(i1==mid+1) -mXEbsm
data[cur]=temp[i2++]; %`~8j H@
else if(i2>r) 1JM~Ls%Z
data[cur]=temp[i1++]; Y9u2:y!LdL
else if(temp[i1] data[cur]=temp[i1++]; r|(Lb'k
else -4;u|0_
data[cur]=temp[i2++]; ~(c<ioIf
} "o1/gV
} & 3gni4@@
vgV0a{u"
} 3yQ(,k#
t|//oEY
改进后的归并排序: ~b+>o
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package org.rut.util.algorithm.support; {5*5tCIt
n\QG-?%Pi
import org.rut.util.algorithm.SortUtil; CA3.fu3(p
1\BECP+
/** rpd3Rp
* @author treeroot 22GtTENd1h
* @since 2006-2-2 gaJS6*P#
* @version 1.0 h)w<{/p(
*/ -Fb/GZt|
public class ImprovedMergeSort implements SortUtil.Sort { y ^YrGz.
l4; LV7Ji
private static final int THRESHOLD = 10; %n( s;/_
cNHNh[ C
/* _L"rygit
* (non-Javadoc) ve$P=ZuM
* {W-PYHZ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IJ!UKa*o%
*/ I++!F,pB
public void sort(int[] data) { 6>l-jTM
int[] temp=new int[data.length]; |YH1q1l
mergeSort(data,temp,0,data.length-1); tW,<Pe
} TGg*(6'z
Jyd%!v
private void mergeSort(int[] data, int[] temp, int l, int r) { Z/64E^
int i, j, k; (T@ov~@
int mid = (l + r) / 2; te1lUQ
if (l == r) k&Sg`'LG8
return; 'h:4 Fzo<
if ((mid - l) >= THRESHOLD) _PuMZjGL
mergeSort(data, temp, l, mid); 2 `#|;x^<
else $T1c{T6n}
insertSort(data, l, mid - l + 1); #pf}q+A
if ((r - mid) > THRESHOLD) hM;EUWv
mergeSort(data, temp, mid + 1, r); 0j3j/={|.1
else 7JujU.&{6
insertSort(data, mid + 1, r - mid); /q]WV^H
f6DPah#
for (i = l; i <= mid; i++) { ioZ2J"s
temp = data; 1@/+ c
} bo]k9FC
for (j = 1; j <= r - mid; j++) { X[VQ 1
temp[r - j + 1] = data[j + mid]; __zsrIUJ
} )sW1a
int a = temp[l]; Bq'hk<ns[
int b = temp[r]; 1[!Idl?m
for (i = l, j = r, k = l; k <= r; k++) { HzWZQ6o
if (a < b) { sR5dC_
data[k] = temp[i++]; /6>2,S8Ar
a = temp; pPh$Jvo]
} else { KxY|:-"Tt
data[k] = temp[j--]; `P'{HT
b = temp[j]; ?9AByg
} #x'C
} xe 6x!
} _I2AJn`#
4pF%G
/** 7bTs+C_;7
* @param data 0evG
* @param l m(9E{;
* @param i L-Z1Xs
*/ 8R)*8bb
private void insertSort(int[] data, int start, int len) { '?#e$<uS-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H>M0GL
} y1P?A]v
} !]W6i]p
} (!;4Y82#
} wjY3:S~
[j&>dE
堆排序： %uQ^mK
#B54p@.}
package org.rut.util.algorithm.support; F> ..eK
WWD\EDnS
import org.rut.util.algorithm.SortUtil; rGx1>xd(k
(R.k.,z
/** r0_3`;H
* @author treeroot +-5CM0*&
* @since 2006-2-2 bE0cW'6r
* @version 1.0 ZQ@^(64
*/ TMGZHOAt
public class HeapSort implements SortUtil.Sort{ T"3WB o
;5oY)1
/* (non-Javadoc) +>{{91mN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D_'Zucq
*/ B>gC75
public void sort(int[] data) { ^lbOv}C*
MaxHeap h=new MaxHeap(); F)!B%4
h.init(data); sA:0b5_a
for(int i=0;i h.remove(); o:m:9dn
System.arraycopy(h.queue,1,data,0,data.length); }(ot IqE
} M7UVL&_z%
P oC*>R8
private static class MaxHeap{ =TU"B-*
7(ZI]<
void init(int[] data){ )R,*>-OPJL
this.queue=new int[data.length+1]; 3xbA]u;gp
for(int i=0;i queue[++size]=data; Gh|q[s*k
fixUp(size); "c=\?
} !i0:1{.
} g5_]^[upw
I9TOBn|6
private int size=0; `2 Z
Q_]O[Kx
private int[] queue; vA"yy"B+ V
dfO84Z} 5
public int get() { iw<+rh*C
return queue[1]; J$@3,=L6V
} -&%#R_RV
{'EQ%H$q
public void remove() { 0t'WM=W<!8
SortUtil.swap(queue,1,size--); &U!@l)<
fixDown(1); HSq&'V
} #*XuU8q?
file://fixdown Lw1~$rZg
private void fixDown(int k) { 3/P2&m
int j; 0vf2wBK'T
while ((j = k << 1) <= size) { pv;}Sv$ ]-
if (j < size %26amp;%26amp; queue[j] j++; l. !5/\
if (queue[k]>queue[j]) file://不用交换 }D{y u+)
break; |-=^5q5
SortUtil.swap(queue,j,k); dKi+~m'w
k = j; K%Jy?7 U
} L-",.U*;
} D'c,z[
private void fixUp(int k) { szGp<xv_p
while (k > 1) { e\tcP
int j = k >> 1; ?kISAA4x
if (queue[j]>queue[k]) x)5#*Q
break; Z[[@O
SortUtil.swap(queue,j,k); >ouHR*
k = j; `gSqwN<x%
} zHeqV
} Z<;am
_/]4:("
} 4F^(3RKZ|
+'x|VPY.PG
} ZQZ>{K
grp1nWAs
SortUtil： oX8e}
q!t_qX7u
package org.rut.util.algorithm; XSkx<"U*
t,)`Zu$
import org.rut.util.algorithm.support.BubbleSort; ,=.&
import org.rut.util.algorithm.support.HeapSort; R*VJe+5w
import org.rut.util.algorithm.support.ImprovedMergeSort; c>,|[zP{
import org.rut.util.algorithm.support.ImprovedQuickSort; BRhAL1
import org.rut.util.algorithm.support.InsertSort; $i7iv
import org.rut.util.algorithm.support.MergeSort; gk1I1)p
import org.rut.util.algorithm.support.QuickSort; YP5V~-O/
import org.rut.util.algorithm.support.SelectionSort; .r[kNh@ b%
import org.rut.util.algorithm.support.ShellSort; 8fY1~\G:\
049E#[<Q"
/** \,+act"v
* @author treeroot Dh*Uv,
* @since 2006-2-2 tl !o;`W
* @version 1.0 y_;LTCj?
*/ _ )b:F=4j
public class SortUtil { 4en[!*
public final static int INSERT = 1; ]_G!(`Udh
public final static int BUBBLE = 2; z GhJ
public final static int SELECTION = 3; nB[Aw7^|A
public final static int SHELL = 4; 0hp*(, L
public final static int QUICK = 5; j|N;&s`
public final static int IMPROVED_QUICK = 6; tg_v\n
public final static int MERGE = 7; R/VrBiw
public final static int IMPROVED_MERGE = 8; TyI"fP
public final static int HEAP = 9; }`FC'!(
w)2X0ev"
public static void sort(int[] data) { Yg3Vj=
sort(data, IMPROVED_QUICK); 7j8nDX<
} }\!&3^I
private static String[] name={ $<xa "aN!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vc0'x4
}; -]C3_ve
-|"W|K?nq
private static Sort[] impl=new Sort[]{ &-mPj82R
new InsertSort(), fRS)YE@a:
new BubbleSort(), Q& j:ai*
new SelectionSort(), f|P%
new ShellSort(), :OT~xU==H
new QuickSort(), 7A@]t_83Y
new ImprovedQuickSort(), qq9fZZb
new MergeSort(), Oc8]A=M12
new ImprovedMergeSort(), ;5urIYd
new HeapSort() )u)]#z
}; 3GqvL_
U bUl]
public static String toString(int algorithm){ ?BtWM4Id8
return name[algorithm-1]; !Bcd\]q
} w 4-E@>%
G$kspN*"A
public static void sort(int[] data, int algorithm) { 2Z!%Q}Do
impl[algorithm-1].sort(data); ,1J+3ugp&
} V4@HIM
wH&[Tg
public static interface Sort { Z#0hh%E"|y
public void sort(int[] data); Y??8P
} BIovPvq;i
mF7T=pl
public static void swap(int[] data, int i, int j) { 6EfGJq
int temp = data; yU`"]6(@[
data = data[j]; g).k+
data[j] = temp; MLf,5f;e
} !|}(tqt
} A14}