[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; TwZmZE ?!
} !5zj+N
int i1=l; \S#![NC
int i2=mid+1; Q=498Y~x
for(int cur=l;cur<=r;cur++){ ynq^ztBVe
if(i1==mid+1) $.Qq:(O:6
data[cur]=temp[i2++]; d-UQc2r
else if(i2>r) Eye.#~
data[cur]=temp[i1++]; # i|pi'Ij
else if(temp[i1] data[cur]=temp[i1++]; .gwT?O,
else CVgVyy^
data[cur]=temp[i2++]; OYIH**?
} 35#"]l"
} ]#O~lq
Kb#Z(C9
} csv;u'
u3vw[k
改进后的归并排序: mm`yu$9gbP
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package org.rut.util.algorithm.support; *edhJUT
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import org.rut.util.algorithm.SortUtil; G8CM
JN<u4\e{-&
/** D7,{p2<2T
* @author treeroot u`Zj~t
* @since 2006-2-2 m@c\<-P
* @version 1.0 /80RO:'7
*/ KZsJ_t++!W
public class ImprovedMergeSort implements SortUtil.Sort { lT-LOu|
!-|{B3"6
private static final int THRESHOLD = 10; `yua?n
RATW[(ZA
/* 8(GJz ~y
* (non-Javadoc) 0(az80 p
* idP2G|Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5l /EZ\q
*/ vt2A/9_Z%
public void sort(int[] data) { ~&8bVA= .
int[] temp=new int[data.length]; ":Ll.=!
mergeSort(data,temp,0,data.length-1); uKpWb1(
} sxn^1|O;m
_*dUH5
private void mergeSort(int[] data, int[] temp, int l, int r) { :J;*]o:
int i, j, k; J*r%b+
int mid = (l + r) / 2; \9jvQV/y
if (l == r) r|0wIpi6Q
return; [f@[gE
if ((mid - l) >= THRESHOLD) H1kxY]_/
mergeSort(data, temp, l, mid); aiwKkf`\
else P4dhP-t
insertSort(data, l, mid - l + 1); ]c$)0O\O
if ((r - mid) > THRESHOLD) M@78.lPS
mergeSort(data, temp, mid + 1, r); H6%%n X
else DH{^9HK
insertSort(data, mid + 1, r - mid); z+qrsT/?L
Y.v. EZ
for (i = l; i <= mid; i++) { .l ufE
temp = data; +OX:T) 4h6
} J^<}fRw
for (j = 1; j <= r - mid; j++) { 4ai|*8.
temp[r - j + 1] = data[j + mid]; dhmZ3~cW>
} 3!0~/8!f@
int a = temp[l]; 0l>4Umxr{J
int b = temp[r]; *Bm _
for (i = l, j = r, k = l; k <= r; k++) { 6-h(305A
if (a < b) { q, XRb
data[k] = temp[i++]; We*&\e+"T
a = temp; <vUhJgN2/
} else { ;dE'# Kb
data[k] = temp[j--]; Ij9ezNZT=
b = temp[j]; Y>2kOE
} { x/~gp
} qD<\U
} f{eMh47 NC
i*ErxWzu
/** pLea 4
* @param data [|"{a
* @param l }0z]sYI
* @param i hqVxvS"
*/ KBkS>0;X
private void insertSort(int[] data, int start, int len) { b?{\t;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EQ>]~
} &R;Cm]jt
} iW,fKXuo&y
} `M.\D
} , UiA?7k
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堆排序： t1MK5B5jH
N#zh$0!8bJ
package org.rut.util.algorithm.support; TZYz`l+v
~gJJ@j 0n
import org.rut.util.algorithm.SortUtil; <b$.{&K
}6!*H!
/** 40)Ti
* @author treeroot 4fa2_
* @since 2006-2-2 b!3Y<D*
* @version 1.0 ;j^C35
*/ 8ZPjzN>c6
public class HeapSort implements SortUtil.Sort{ mKN#dmw6
N!iugGL
/* (non-Javadoc) -J\R}9 lIm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qVMBZ\`Qm
*/ bL9vjD'}
public void sort(int[] data) { ;'~GuZ#I
MaxHeap h=new MaxHeap(); 9E-]S'Z
h.init(data); r; pS_PV
for(int i=0;i h.remove(); [OK(
System.arraycopy(h.queue,1,data,0,data.length); J.^%VnrFO9
} _m2p>(N|
AIX?840V
private static class MaxHeap{ "{"745H5
eUeOyC
void init(int[] data){ N^;rLrm*
this.queue=new int[data.length+1]; " }oH3L
for(int i=0;i queue[++size]=data; =LHz[dSL
fixUp(size); _,{R3k
} u#r[JF9LP
} +4]31d&3
h}knn3"S
private int size=0; Q8>
"ukiuCfVuW
private int[] queue; M:QM*?+)
3yp?|>e
public int get() { L j>HZS$F
return queue[1]; O|I)HpG;
} 7ts`uI<E@7
oW\kJ>!
public void remove() { Wd<|DmSy
SortUtil.swap(queue,1,size--); .qAlPe L:
fixDown(1); $G}!eV 6
} d:SLyFD$q
file://fixdown h}SP`
private void fixDown(int k) { k^C^.[?
int j; VS ?npH
while ((j = k << 1) <= size) { z(g6$Y{
if (j < size %26amp;%26amp; queue[j] j++; ~H1ZQ[
if (queue[k]>queue[j]) file://不用交换 MR`lF-|a|
break; 5%1a!MM M
SortUtil.swap(queue,j,k); }I>h<O
k = j; Tw0GG8(c
} U1;<NUg
} 3Eu;_u_
private void fixUp(int k) { $l+DkR+
while (k > 1) { +\/1V`
int j = k >> 1; Wt 1]9{$
if (queue[j]>queue[k]) #[$zbZ(I>:
break; dJ&f +
SortUtil.swap(queue,j,k); Ka+N5 T.f
k = j; [B+]F~}@
} eb#p-=^KP
} +u\kTn
yh:Wg$qx
} SQ0?M\D7
}K'gjs/N;
} |rr<4>)X
fs,]%g^
SortUtil： jhF&
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package org.rut.util.algorithm; ])tUXU>
Wkj0z]]?
import org.rut.util.algorithm.support.BubbleSort; x?rn<=
import org.rut.util.algorithm.support.HeapSort; 2.PZtl
import org.rut.util.algorithm.support.ImprovedMergeSort; OLs<]0H
import org.rut.util.algorithm.support.ImprovedQuickSort; K);)$8K
import org.rut.util.algorithm.support.InsertSort; =%Z5"];
import org.rut.util.algorithm.support.MergeSort; A\:u5(
import org.rut.util.algorithm.support.QuickSort; |zCT~#
import org.rut.util.algorithm.support.SelectionSort; 4157!w'\y
import org.rut.util.algorithm.support.ShellSort; U *K6FWqiB
VAnP3:
/** >Sc/E}3
* @author treeroot "%E<%g
* @since 2006-2-2 KbTd`AIL
* @version 1.0 unD.t
*/ |D1:~z
public class SortUtil { 4];<` %
public final static int INSERT = 1; ,d`6 {ll
public final static int BUBBLE = 2; YHQvx_0yP
public final static int SELECTION = 3; tRu j}n+x
public final static int SHELL = 4; Uy98lv
public final static int QUICK = 5; @t{`KB+ ^
public final static int IMPROVED_QUICK = 6; mIh >8))E
public final static int MERGE = 7; hSgH;k
public final static int IMPROVED_MERGE = 8; e]DuV)k&
public final static int HEAP = 9; Bj*\)lG<
qac8zt#2 C
public static void sort(int[] data) { {v>8Kp7_R
sort(data, IMPROVED_QUICK); GJTakhj3
} P1qQ)-J
private static String[] name={ aGbHDo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !))!!{
}; HnsPXF'8g
K=N8O8R$y
private static Sort[] impl=new Sort[]{ t/B4?A@C
new InsertSort(), U~I y),5
new BubbleSort(), Rv)*Wo!L
new SelectionSort(), nI7v:h4
new ShellSort(), A~M.v0
new QuickSort(), ,,=VF(@G
new ImprovedQuickSort(), F!7\Za,
new MergeSort(), ?A]/ M~3B
new ImprovedMergeSort(), $w+()iI
new HeapSort() k3CHv=U{
}; 6;Sz^W
Jt(RF*i
public static String toString(int algorithm){ 7KJ%-&L^
return name[algorithm-1]; ^@HWw@GA
} 31&;3?3>
-^ R?O
public static void sort(int[] data, int algorithm) { )K!!Zq3;|
impl[algorithm-1].sort(data); w\lc;4U
} \N[2-;[3
>J) 9&?
public static interface Sort { Uu[dx}y
public void sort(int[] data); \5P 5N]]
} x T1MW
]O&\Pn0q
public static void swap(int[] data, int i, int j) { SQT]'
int temp = data; g#lMT%
data = data[j]; kca#ssN
data[j] = temp; /*e6('9s
} ~?zu5,vb
} Aaug0X