[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; BI*0JKQu
} ^J^FGo|M
int i1=l; ;~[}B v
int i2=mid+1; PecZuv
for(int cur=l;cur<=r;cur++){ @]}/vsI m
if(i1==mid+1) /0|1xHs
data[cur]=temp[i2++]; sMUpkU-
else if(i2>r) K]M@t=
data[cur]=temp[i1++]; AS~!YR
else if(temp[i1] data[cur]=temp[i1++]; _nxu8g]
else xt"-Jmox
data[cur]=temp[i2++]; i1KjQ1\a+
} ggM~Chr
} w,R6:*p5
!T ,=kh
} ,C0y3pL
)Td{}vbIh
改进后的归并排序: Xc" %-
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package org.rut.util.algorithm.support; R~[~(`/S
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import org.rut.util.algorithm.SortUtil; ?P>4H0@I+
d^!3&y&
/** ru`U/6n
* @author treeroot 83'+q((<
* @since 2006-2-2 ?YV# K
* @version 1.0 YPY,gR
*/ 7w8UnPuM
public class ImprovedMergeSort implements SortUtil.Sort { n$7*L9)(C
lVd-{m)
private static final int THRESHOLD = 10; jA^Dk$
P7bb2"_9
/* Gx}`_[-
* (non-Javadoc) xWK/uE(
* 9Hb|$/FD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @)[8m8paV
*/ S+wT}_BQ
public void sort(int[] data) { 2*#i/SE_
int[] temp=new int[data.length]; c$BH`" <*
mergeSort(data,temp,0,data.length-1); 1=,2i)
} Jmg9|g!f
2 @T~VRy
private void mergeSort(int[] data, int[] temp, int l, int r) { )8aHj4x
int i, j, k; c|aX4=Z
int mid = (l + r) / 2; $o\z4_I
if (l == r) birc&<
return; P?n4B \!
if ((mid - l) >= THRESHOLD) J=: \b
mergeSort(data, temp, l, mid); :g|NE\z`)/
else `#8kJt
insertSort(data, l, mid - l + 1); :&'jh/vRN
if ((r - mid) > THRESHOLD) 3T,[
mergeSort(data, temp, mid + 1, r); dPf7o
else &nI>`Q'
insertSort(data, mid + 1, r - mid); ^?sP[;8S!
+r;t]
for (i = l; i <= mid; i++) { rKFnivGT
temp = data; g)TZ/,NQ{
} [{GN#W|AGP
for (j = 1; j <= r - mid; j++) { pnz:<V"Y(
temp[r - j + 1] = data[j + mid]; i4h`jFS
} #>,E"-]f
int a = temp[l]; 5~jz| T}s
int b = temp[r]; \)o.Y zAo@
for (i = l, j = r, k = l; k <= r; k++) { IpSWg
if (a < b) { $0 vT_
data[k] = temp[i++]; @n.n[zb\|
a = temp; {I$iD
} else { i$6rnS&C
data[k] = temp[j--]; X;UEq]kcmn
b = temp[j]; +lVA$]d
} _Y]Oloo('
} _kMHF
} WSxoGly
%*npLDi
/** ITqAy1m@C
* @param data dhnX\/
* @param l tD}-&"REP
* @param i E0fMFG^P
*/ w{xa@Q]t-
private void insertSort(int[] data, int start, int len) { Xa#.GrH6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'Q:%s
} JA9NTu(
} ^0}wmxDq
} @{_X@Wv4iV
} \#) YS
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堆排序： N wNxO
_a& Z$2O
package org.rut.util.algorithm.support; _D?/$D7u#%
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import org.rut.util.algorithm.SortUtil; r2'K'?T3
fiA8W
/** HK<S|6B7V
* @author treeroot ^AJ 2Y_}v
* @since 2006-2-2 /j$pV
* @version 1.0 =>3,]hnep
*/ KA{QGaZ/
public class HeapSort implements SortUtil.Sort{ wXqwb|2
IZLCwaW
/* (non-Javadoc) tKLeq(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |;)_-=L0P
*/ X o9vE3
public void sort(int[] data) { uE(5q!/
MaxHeap h=new MaxHeap(); 5WRqeSGh
h.init(data); C6a-
for(int i=0;i h.remove(); ',WJ'g
System.arraycopy(h.queue,1,data,0,data.length); .B2e$`s$
} {fl[BX]kZ
1D8S}=5&
private static class MaxHeap{ G9QvIXRi
?f'`b<o
void init(int[] data){ ps,Kj3^T<
this.queue=new int[data.length+1]; L&:A59)1k
for(int i=0;i queue[++size]=data; <b_K*]Z
fixUp(size); 7]5~ml3:
} K3tW Y 4-
} # .(f7~
Rc4=zimr+
private int size=0; C\BKdx5;
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private int[] queue; mSu$1m8
I/A%3i=H
public int get() { <_eEpG}9
return queue[1]; ip{b*@K
} ebCS4&c
"oZ_1qi<
public void remove() { o(l%k},a
SortUtil.swap(queue,1,size--); [] "bn9 +
fixDown(1); u0oTqD?
} }u0&>k|y
file://fixdown ~.U\Y
private void fixDown(int k) { G^K;+&T
int j; P2s\f;Dwr
while ((j = k << 1) <= size) { &K[~Ab_
if (j < size %26amp;%26amp; queue[j] j++; iRG6Cw2
if (queue[k]>queue[j]) file://不用交换 AOcUr)
break; 5-({z%:P
SortUtil.swap(queue,j,k); '3Fb[md54
k = j; ..'"kX:5
} 3&M0@/
} #FRm<9/j
private void fixUp(int k) { KY%qzq,n
while (k > 1) { 0Db=/sJ>
int j = k >> 1; gPd,
if (queue[j]>queue[k]) E1Q#@*rX>
break; Y@MxKKuj
SortUtil.swap(queue,j,k); UEYJd&n0CB
k = j; })(robBkA
} p*@t$0i
} k_?OEkgUh
yn(bW\
} 7u:kR;wk
*u,&?fCl
} M80O;0N%A
PX/^*
SortUtil： y[S9b(:+
~Ij/vyB_
package org.rut.util.algorithm; ]EDCs?,
b~YIaD[Z
import org.rut.util.algorithm.support.BubbleSort; u%"5<ll
import org.rut.util.algorithm.support.HeapSort; u:l<NWF^
import org.rut.util.algorithm.support.ImprovedMergeSort; ^x^(Rk}|
import org.rut.util.algorithm.support.ImprovedQuickSort; 4,Uqcw?!F'
import org.rut.util.algorithm.support.InsertSort; #RSUChe7w
import org.rut.util.algorithm.support.MergeSort; Vl<7>
import org.rut.util.algorithm.support.QuickSort; o:4#AkS
import org.rut.util.algorithm.support.SelectionSort; 8.IenU9
import org.rut.util.algorithm.support.ShellSort; q3K}2g
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/** 2!b##`UjA7
* @author treeroot oY; C[X
* @since 2006-2-2 m$pRA0s2`
* @version 1.0 QJjk#*?,|
*/ g\IwV+iDf
public class SortUtil { f3>DmH#
public final static int INSERT = 1; -m ;n}ECg
public final static int BUBBLE = 2; a=9QwEZ
public final static int SELECTION = 3; vO/3bu}
public final static int SHELL = 4; V 7ZGT
public final static int QUICK = 5; ?FR-aXx
public final static int IMPROVED_QUICK = 6; D$NpyF.87
public final static int MERGE = 7; 9v8^uPA
public final static int IMPROVED_MERGE = 8; YGc:84S
public final static int HEAP = 9; HGd.meQ
uq54+zC
public static void sort(int[] data) { ;mwnAO
sort(data, IMPROVED_QUICK); |pq9i)e&
} fWi/mK3c
private static String[] name={ +#<Z/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @A*>lUo
}; cKoW5e|u
|z:4T%ES
private static Sort[] impl=new Sort[]{ %so{'rQl
new InsertSort(), ]T2Nr[vu
new BubbleSort(), 6Q_A-X3hk
new SelectionSort(), B_b5&M@
new ShellSort(), _)~VKA]""
new QuickSort(), fz2}M:u
new ImprovedQuickSort(), jcBZ#|B7;
new MergeSort(), R-1MD
new ImprovedMergeSort(), 8~TKiR5
new HeapSort() V@O)7ND
}; 8VO];+N
6CW5ay_,
public static String toString(int algorithm){ 'U0W
return name[algorithm-1]; X|ZAC!J5>
} zEukEA^9`
LNHi}P~
public static void sort(int[] data, int algorithm) { wEJzLFCn
impl[algorithm-1].sort(data); G'(rjH>q
} BHZhdm@),
[+xsX*+
public static interface Sort { \4C[<Gbx$(
public void sort(int[] data); g%!U7CM6h
} 10OkrNQ
n9`]}bnX
public static void swap(int[] data, int i, int j) { aJA(UN45
int temp = data; !@N?0@$/
data = data[j]; oM Z94,3
data[j] = temp; b(Tvc
} Y#~A":A
} /@\R