[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; hZc$`V=R
} xNE<$Bz
int i1=l; !XzRV?Ih;
int i2=mid+1; R9fM9
for(int cur=l;cur<=r;cur++){ /R 2:Js
if(i1==mid+1) u@[D*c1!H
data[cur]=temp[i2++]; vKol@7%N
else if(i2>r) PL%_V ?z
data[cur]=temp[i1++]; nuhKM.a{
else if(temp[i1] data[cur]=temp[i1++]; &kYg >X
else #RZW)Br
data[cur]=temp[i2++]; V\X.AGc
} vYrqZie<
} mqw&SxU9
h-Ffs
} VmV/~-<Z
!W .ooy5(
改进后的归并排序: m~#98ZJ^
F.^1|+96
package org.rut.util.algorithm.support; >$?$&+e}
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import org.rut.util.algorithm.SortUtil; w*\)]bTs
?IGT!'
/** y`7BR?l
* @author treeroot 4~DFtWbf
* @since 2006-2-2 hSo\
* @version 1.0 I>b!4?h
*/ ON] z-
public class ImprovedMergeSort implements SortUtil.Sort { #R'm|En'
N1+%[Uh9)
private static final int THRESHOLD = 10; Th'6z#h:U
:hCp@{
/* OAR#* ~q
* (non-Javadoc) 7p@qzE
* /wH]OD{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iK= {pd
*/ 3dQV5E.
public void sort(int[] data) { s?7g3H5#0k
int[] temp=new int[data.length]; yG2j!D
mergeSort(data,temp,0,data.length-1); 5e6]v2 k
} pRc@0^G
lLS`Ln)"
private void mergeSort(int[] data, int[] temp, int l, int r) { 50uNgLs
int i, j, k; /i"L@t)\t
int mid = (l + r) / 2; YeptYW@xfw
if (l == r) _;L9&>!p6
return; i|)<#Ywl
if ((mid - l) >= THRESHOLD) ,*}SfCon
mergeSort(data, temp, l, mid); (7;}F~?h
else )&;?|X+p
insertSort(data, l, mid - l + 1); 9JJ(KY
if ((r - mid) > THRESHOLD) =| %:d:r
mergeSort(data, temp, mid + 1, r); Jf YO|,
else nO,<`}pV
insertSort(data, mid + 1, r - mid); _<yJQ|[z~i
'k{pWfn=<
for (i = l; i <= mid; i++) { 8{(;s$H~
temp = data; 59FAhEg
} o} YFDYi
for (j = 1; j <= r - mid; j++) { |!aMj8i2
temp[r - j + 1] = data[j + mid]; Jp=ur)Dj
} E,>/6AU
int a = temp[l]; O*`] ]w]
int b = temp[r]; XjuAVNY
for (i = l, j = r, k = l; k <= r; k++) { [wj&.I{^s
if (a < b) { 0ua.aL'
data[k] = temp[i++]; zdlysr#
a = temp; k8Qm +r<p
} else { {I&>`?7.
data[k] = temp[j--]; @M?;~M?B]J
b = temp[j]; 27<~m=`}d
} Ma2sQW\
} p.SEW5
} wm%9>mA%
OjCTTz
/** >RG }u
* @param data 4ac2^`
* @param l FI`][&]V
* @param i \/xWsbG\
*/ f-E]!\Pg
private void insertSort(int[] data, int start, int len) { :-fCyF)EI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y9cW&rDH
} hl(M0cxEWP
} ' jf$3
} "W?<BpV~@!
} +ng8!k
{r?O>KDQf(
堆排序： jSsbLa@
:,h47'0A
package org.rut.util.algorithm.support; PmZ-H>
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import org.rut.util.algorithm.SortUtil; 7hlgm7^
n{s `XyH
/** Fo|6 PoSo
* @author treeroot jeFX?]Q
* @since 2006-2-2 6}qp;mR E]
* @version 1.0 O-[lL"T
*/ K?+iu|$&
public class HeapSort implements SortUtil.Sort{ *yN+Xm8o
jjN]*{s
/* (non-Javadoc) swss#?.se
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s5F,*<
*/ s2FJ^4
public void sort(int[] data) { z@R:~
MaxHeap h=new MaxHeap(); *e&OpVn
h.init(data); &U^6N+l9
for(int i=0;i h.remove(); rvgArFf}]
System.arraycopy(h.queue,1,data,0,data.length); ]?whx&+
} 8=Xy19<;t
s.d }*H-o
private static class MaxHeap{ d~M;@<eD
u,mC`gz
void init(int[] data){ >`R}ulz)
this.queue=new int[data.length+1]; ebxpKtEC
for(int i=0;i queue[++size]=data; (RW02%`jjy
fixUp(size); iG()"^G
} ~>2@55wElp
} !C]0l
TPEg>[
private int size=0; i0; p?4`m
*p0n{F9
private int[] queue; K;^$n>Y
"#anL8
public int get() { D/[(}o(
return queue[1]; ca%s$' d
} #usi1UWB#Q
:y^0]In
public void remove() { puEuv6F
SortUtil.swap(queue,1,size--); p_pI=_:
fixDown(1); CV&+^_j'k
} s ~c_9,JK
file://fixdown FRqJ#yd]
private void fixDown(int k) { do@`(f3g
int j; fG_.&!P
while ((j = k << 1) <= size) { hfw$820y[
if (j < size %26amp;%26amp; queue[j] j++; \Jq$!foYx
if (queue[k]>queue[j]) file://不用交换 ^x8*]Sz#x
break; "& h;\hL
SortUtil.swap(queue,j,k); lJ1_Zs `
k = j; ZZ|a`U
} 53=5xE= `D
} nQm7At
private void fixUp(int k) { KKB&)R
while (k > 1) { *S,5
int j = k >> 1; ElLDSo@WvR
if (queue[j]>queue[k]) -]HPDN,OB
break; j:ze5FA+
SortUtil.swap(queue,j,k); s~(!m. R
k = j; Hs,pY(l^
} 6%?bl{pNn
} Z&BJ/qk \-
]U?)_P@}
} AT*J '37
7L2$(d4
} |&!04~s;E
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SortUtil： 6?GR+;/
UolsF-U}'
package org.rut.util.algorithm; bWU4lPfP
D&0y0lxI@
import org.rut.util.algorithm.support.BubbleSort; 8NU<lV`
import org.rut.util.algorithm.support.HeapSort; I2"F2(>8K
import org.rut.util.algorithm.support.ImprovedMergeSort; ;>%@
import org.rut.util.algorithm.support.ImprovedQuickSort; P|c[EUT
import org.rut.util.algorithm.support.InsertSort; B. '&[A
import org.rut.util.algorithm.support.MergeSort; "*E06=fiG
import org.rut.util.algorithm.support.QuickSort; YhQ;>Ko
import org.rut.util.algorithm.support.SelectionSort; {-?^j{O0.
import org.rut.util.algorithm.support.ShellSort; Nmu;+{19M
YB?yi( "yL
/** J" :R,w`
* @author treeroot ;;|S QX
* @since 2006-2-2 =@BVO@z@
* @version 1.0 W>[0u3
*/ rZ[}vU/H`
public class SortUtil { 4I&e_b< 30
public final static int INSERT = 1; 4R<bfZ43
public final static int BUBBLE = 2; y8~/EyY|^
public final static int SELECTION = 3; (|Zah1k&]
public final static int SHELL = 4; !Miw.UmPm
public final static int QUICK = 5; Y'n+,g
public final static int IMPROVED_QUICK = 6; j'xk[bM
public final static int MERGE = 7; y$-;6zk\]
public final static int IMPROVED_MERGE = 8; 0_\@!#-sml
public final static int HEAP = 9; ?4QX;s7
m3Ma2jLWC
public static void sort(int[] data) { !mX-g]4E
sort(data, IMPROVED_QUICK); 2GRL`.1
} MLVrL r t
private static String[] name={ 1dsMmD[O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z#DgoA
}; =]Gw9sge@
*SP@`)\D
private static Sort[] impl=new Sort[]{ &:Mk^DH5
new InsertSort(), [22>)1<(
new BubbleSort(), `Ckx~'1M:
new SelectionSort(), e$ pXnMx7
new ShellSort(), LHJ}I5zv
new QuickSort(), i"4&UJu1;
new ImprovedQuickSort(), CSu}_$wC#
new MergeSort(), Obj?,O
new ImprovedMergeSort(), e#{,M8
new HeapSort() ?7?hDw_Nk
}; IhRWa|{I
l:Hm|9UZ
public static String toString(int algorithm){ .A6i?iROe
return name[algorithm-1]; fm u;Pb]r
} a8Va3Y
o'#ow(X
public static void sort(int[] data, int algorithm) { A.[~}ywH
impl[algorithm-1].sort(data); ],.1=iY
} DAvF ND$=
()cqax4
public static interface Sort { ON()2@Y4
public void sort(int[] data); ;&K +x@
} ]; CTr0
= ^NTHc^*
public static void swap(int[] data, int i, int j) { 16pk4f8
int temp = data; )P|&o%E
data = data[j]; tV'>9YVdG
data[j] = temp; F0i`HO{
} 1ha 8)L
} +Y|1 7n