[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; y$v@wb5
} 2:/u2K
int i1=l; 7Ff?Ysr
int i2=mid+1; oEPNN'~3
for(int cur=l;cur<=r;cur++){ G/%Ubi6%
if(i1==mid+1) B^Bbso'{1
data[cur]=temp[i2++]; k{qLkcOg=
else if(i2>r) \ j x0ZHR
data[cur]=temp[i1++]; I<9n(rA
else if(temp[i1] data[cur]=temp[i1++]; _H/67dcz,
else J(&Gmk9&
data[cur]=temp[i2++]; S].Ft/+H
} !}j,TPpG
} "h`54}0
# s,Y% Bce
} 6BR\iZ
u[: P
改进后的归并排序: s.bT[0Vl
0~:eSWz=
package org.rut.util.algorithm.support; M@5KoMsB9
b3P9Yoj-
import org.rut.util.algorithm.SortUtil; GW:\l~ d
8_+vb#M
/** @>gD1Q7v b
* @author treeroot #Ul4&QVeg
* @since 2006-2-2 *+NZQjl'
* @version 1.0 ZtKQ]jV&@
*/ dqL-'
public class ImprovedMergeSort implements SortUtil.Sort { KWtu,~O_u
Sn+FV+D
private static final int THRESHOLD = 10; }^IwQm*i
f>?^uSpWH
/* L F8Pb;I
* (non-Javadoc) dp33z"<3
* X!2.IsIS8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QId"Cl)3
*/ li1v 4
public void sort(int[] data) { e2qpJ4i
int[] temp=new int[data.length]; .<0=a|IAz
mergeSort(data,temp,0,data.length-1); 9PUa?Bc`=
} v hR twi
CL EpB2_
private void mergeSort(int[] data, int[] temp, int l, int r) { )#)nBM2\
int i, j, k; ;K>{_kf
int mid = (l + r) / 2; )A"ZV[eOoQ
if (l == r) kT>r<`rt
return; e!.7no
if ((mid - l) >= THRESHOLD) rL.<Z@-
mergeSort(data, temp, l, mid); ^l&nB.
else -qs(2^
insertSort(data, l, mid - l + 1); ,*q#qW!!
if ((r - mid) > THRESHOLD) :,urb*
mergeSort(data, temp, mid + 1, r); :~WPY9i`
else ],H1
insertSort(data, mid + 1, r - mid); NW}>pb9
#>MO]
for (i = l; i <= mid; i++) { h85(N
temp = data; FLi(#9
} o(?VX`2"
for (j = 1; j <= r - mid; j++) { ',L{CQA?c
temp[r - j + 1] = data[j + mid]; DxE^#=7iH;
} 2Px$0&VN
int a = temp[l]; l6',
int b = temp[r]; gcQ. YP9
for (i = l, j = r, k = l; k <= r; k++) { *(@L+D0N
if (a < b) { jc${.?m
data[k] = temp[i++]; N8Rm})
a = temp; bbfDt^
} else { N |OMj%Uk
data[k] = temp[j--]; 7KvXTrN!9
b = temp[j]; CsJ)Z%4_
} -d$8WSI8
} e{^:/WcYB
} yS1b,cxz
"3U{h]
/** j;ff } b
* @param data ,\\%EZ%a
* @param l 2rPcNh9
* @param i fcgDU *A%
*/ @Fm{6^
private void insertSort(int[] data, int start, int len) { i6meY$l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N#<zEAB
} O;"*_Xq(`
} ~rVKQ-+4&
} */0vJz%<.M
} c9Y2eetO
mB{&7Rb0
堆排序： *"|VNnB
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package org.rut.util.algorithm.support; o<C]+Nt,@
icKg7-$N
import org.rut.util.algorithm.SortUtil; ~ LJ>WA
o(Ua",|
/** 2<46jJYL'
* @author treeroot >!HfH(is\
* @since 2006-2-2 3s+<
* @version 1.0 ~8KF<2c
*/ i6!T`Kau
public class HeapSort implements SortUtil.Sort{ ::3iXk)
Q:-%3)g<<
/* (non-Javadoc) Dz"u8 f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ? 6yF{!F*
*/ 0)6i~MglY
public void sort(int[] data) { IGh !d?D
MaxHeap h=new MaxHeap(); d- Z+fz
h.init(data); Rye~w6
for(int i=0;i h.remove(); }[=xe(4]D
System.arraycopy(h.queue,1,data,0,data.length); I =tyQ`
} 4~MJ4:
Zq\RNZ}
private static class MaxHeap{ 2$j Ot}
AHp830\
void init(int[] data){ :{TmR3.
this.queue=new int[data.length+1]; lRa 3v Ng
for(int i=0;i queue[++size]=data; c&| '3i+
fixUp(size); hJC p0F9O
} L&!g33J&
} +q`rz
t+W=2w&
private int size=0; TQOg~lH
S:2u3th7
private int[] queue; `uM0,Z
B"?+5A7
public int get() { !i~x"1
return queue[1]; g~ppPAH
} n,Yr!W:h
oUKBb&&O
public void remove() { 20Cie q
SortUtil.swap(queue,1,size--); (T%F!2i([U
fixDown(1); !TV_dKa
} ^.Ih,@N6
file://fixdown sT[av
private void fixDown(int k) { -$L],q_S^
int j; |5<&r]xN
while ((j = k << 1) <= size) { =x='<{jtgW
if (j < size %26amp;%26amp; queue[j] j++; y'0dl "Dy\
if (queue[k]>queue[j]) file://不用交换 !ho5VAt
break; |&0"N[t
SortUtil.swap(queue,j,k); .%J?T5D
k = j; xnRp/I
} (giTp@Tp
} I\Gp9w0f
private void fixUp(int k) { HP4'8#3o
while (k > 1) { 3j=%De
int j = k >> 1; \CJx=[3(
if (queue[j]>queue[k]) bCE7hutl
break; f'zU^/$rf
SortUtil.swap(queue,j,k); xtIehr0{$I
k = j; 8XH|T^5
} 8f{}ce'E*
} quCWc2pXX
wEHAkc)Q
} z[KN^2YS
k8x&aH
} d=4f`q0k
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SortUtil： syC"eH3{
2l[A=Z
package org.rut.util.algorithm; iw~V_y4
VM2@{V/=~
import org.rut.util.algorithm.support.BubbleSort; VhH]n yi7D
import org.rut.util.algorithm.support.HeapSort; jL7MmR#y5"
import org.rut.util.algorithm.support.ImprovedMergeSort; ;Xd\$)n
import org.rut.util.algorithm.support.ImprovedQuickSort; m`yn9(1Y[
import org.rut.util.algorithm.support.InsertSort; 0r$hPmvv8
import org.rut.util.algorithm.support.MergeSort; w /W Cj4`
import org.rut.util.algorithm.support.QuickSort; fN"oa>X
import org.rut.util.algorithm.support.SelectionSort; -'H+lrmv
import org.rut.util.algorithm.support.ShellSort; Br ^rK}|l
!OZhfMVd
/** *a4b`HRT
* @author treeroot ?N!j.E4=
* @since 2006-2-2 }N#>q.M
* @version 1.0 _iboTcUF
*/ |3<ehvKy
public class SortUtil { uuUVE/^V'
public final static int INSERT = 1; ev: !,}]w
public final static int BUBBLE = 2; d*\C^:Z
public final static int SELECTION = 3; &TkbnDuYd~
public final static int SHELL = 4; <v7KE*#
public final static int QUICK = 5; q@MjeGs%
public final static int IMPROVED_QUICK = 6; .e _D3Xp<
public final static int MERGE = 7; 4QKE{0NE
public final static int IMPROVED_MERGE = 8; ,m?UFRi
public final static int HEAP = 9; U:P3Z3Y%
d-N"mI-
public static void sort(int[] data) { gh #w%g1g
sort(data, IMPROVED_QUICK); y~A7pzBZ=
} l-^XW?CfL
private static String[] name={ H;t8(-F@'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 't]EkH]BC
}; da?th
o4[2`mT
private static Sort[] impl=new Sort[]{ :{xN33@6\X
new InsertSort(), MMA@J
new BubbleSort(), J2rLsNC]0
new SelectionSort(), ,@>rubUz
new ShellSort(), f`9rTc
new QuickSort(), -SY:qG3?
new ImprovedQuickSort(), |nH0~P#!
new MergeSort(), rIFC#Jd/
new ImprovedMergeSort(), }AsF\W+5
new HeapSort() :D+SY
}; iUG/
<]e;tF)+
public static String toString(int algorithm){ 'Rh>w=wB'
return name[algorithm-1]; 3JE;:2O~P
} 7SY->-H8
rLw[y$2
public static void sort(int[] data, int algorithm) { dzv,)X
impl[algorithm-1].sort(data); ~"rwP=<}
} ISnS;
x&fCe{5
public static interface Sort { !Ub?eJp
public void sort(int[] data); ]qza*ba
} =ci5&B?
T4}?w
public static void swap(int[] data, int i, int j) { o&F.mYnqX
int temp = data; O+o%C*`K
data = data[j]; "g:&Ge*X
data[j] = temp; <K[Zl/7I
} 9MzkG87J
} /GSI.tO