[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; 'L{p,
} `5'2Hg+
int i1=l; W&(f&{A
int i2=mid+1; KFDS q"j
for(int cur=l;cur<=r;cur++){ g_w&"=.jBq
if(i1==mid+1) 0Q~@F3N-\>
data[cur]=temp[i2++]; m&IsDAn
else if(i2>r) [;KmT{I9
data[cur]=temp[i1++]; $ [7 Vgs
else if(temp[i1] data[cur]=temp[i1++]; ([ dT!B#aH
else 5+P@sD
data[cur]=temp[i2++]; gLQ #4H
} ^7aN2o3{
} >fzwFNdo
sG,+
} [$a<b/4
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改进后的归并排序: G#[*|+f8
alm- r-Kb3
package org.rut.util.algorithm.support; 8$vK5Dnn8
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import org.rut.util.algorithm.SortUtil; gUVn;_
+l?; )
/** 9`"DFFSMS
* @author treeroot f:xWu-
* @since 2006-2-2 '{f=hE_/
* @version 1.0 *8)2iv4[
*/ W f@t4(i
public class ImprovedMergeSort implements SortUtil.Sort { ALGgAX3t
0oU=RbC
private static final int THRESHOLD = 10; dqe7sZl!
}!)F9r@\
/* ?4[H]BK
* (non-Javadoc) 4h|dHXYZ
* feEMg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fSA)G$b]
*/ ]Kdet"+
public void sort(int[] data) { Veji^-0E
int[] temp=new int[data.length]; N4UM82N
mergeSort(data,temp,0,data.length-1); C!%:o/
} Qw)9r{f
N/~N7MwJj
private void mergeSort(int[] data, int[] temp, int l, int r) { bAF )Bli
int i, j, k; `v nJ4*
int mid = (l + r) / 2; )`HA::
if (l == r) 7m1KR#j
return; ohQAA h
if ((mid - l) >= THRESHOLD) v{;7LXy0
mergeSort(data, temp, l, mid); {CUk1+
else F#V q#|_)>
insertSort(data, l, mid - l + 1); q'S =Eav8
if ((r - mid) > THRESHOLD) c3xl9S,5
mergeSort(data, temp, mid + 1, r); eN-au/kN
else Mm=Mz
insertSort(data, mid + 1, r - mid); z?ucIsbR
B|o%_:]+E
for (i = l; i <= mid; i++) { j9y3hQ+q
temp = data; #a9_~\s
} p25Fn`}H
for (j = 1; j <= r - mid; j++) { kA#vByf`v
temp[r - j + 1] = data[j + mid]; =-jD~rN4;P
} wu~hqd
int a = temp[l]; +=3CL2{An
int b = temp[r]; F $yO
for (i = l, j = r, k = l; k <= r; k++) { %3=J*wj>D
if (a < b) { JW+*d`8Z[
data[k] = temp[i++]; <94G
a = temp; BWq/TG=>
} else { %:u[MBe,
data[k] = temp[j--]; qfL-r,XS`F
b = temp[j]; "pvZ,l>8f
} hWEnn=BW
} 'K@0Wp
} ]]uHM}l
G=d(*+& B
/** Dpqt;8"2L
* @param data /iM$Tb5
* @param l Z=$T1|
* @param i jNl/!l7B
*/ \,xFg w4
private void insertSort(int[] data, int start, int len) { ~1(j&&kXet
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ae`|ic
} UQ8bN I7
} Omyt2`q
} IF_DZ
} \7 a4uc
kDsIp=
堆排序： h/ep`-YaH
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package org.rut.util.algorithm.support; 3fkk [U
~!:0iFE&H
import org.rut.util.algorithm.SortUtil; _N#&psQzw
vK$^y^
/** 2VgP
* @author treeroot SBfFZw)
* @since 2006-2-2 ,E*R,'w
* @version 1.0 vv5i? F
*/ =!.mGW-Q}
public class HeapSort implements SortUtil.Sort{ (Wj2?k/]
-G`.y?
/* (non-Javadoc) Dz&+PES_k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jPJAWXB4a
*/ Fwfo2
public void sort(int[] data) { *y7 $xa4
MaxHeap h=new MaxHeap(); Y94MI1O5$
h.init(data); H5xzD9K;/C
for(int i=0;i h.remove(); x0+glQrNN
System.arraycopy(h.queue,1,data,0,data.length); LI W*4r!
} iS: #o>
P%>?[9!Nt
private static class MaxHeap{ v,1F--v
$|<m9CW
void init(int[] data){ >S#ul?
this.queue=new int[data.length+1]; rY}B-6qJn
for(int i=0;i queue[++size]=data; f`P9ku#j}
fixUp(size); Qi=*1QAkr
} i$Z#9M9
} M?@pN<|
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private int size=0; <d7xt*4
=!0I_L/
private int[] queue; 1/iE`Si
cf;Ht^M\
public int get() { AtHS@p
return queue[1]; wGLF%;rRe4
} Dkw7]9Qm
SI-X[xf
public void remove() { eBcJm
SortUtil.swap(queue,1,size--); !]b@RUU
fixDown(1); FC>d_=V
} $@uU@fLB
file://fixdown +;gsRhWk
private void fixDown(int k) { ?pwE0N^
int j; ?0vNEz[
while ((j = k << 1) <= size) { AU{:;%.g
if (j < size %26amp;%26amp; queue[j] j++; '"xiS$b(
if (queue[k]>queue[j]) file://不用交换 ?[= U%sPu=
break; v'ay.oVzw
SortUtil.swap(queue,j,k); C1B'#F9EO
k = j; n9oR)&:o
} b|?;h21rG
} optBA3@e!
private void fixUp(int k) { z+VV}:Q
while (k > 1) { G[yI*/E;
int j = k >> 1; Zf:]Gq1
if (queue[j]>queue[k]) >Y&KTSD"
break; vjlGXT`m
SortUtil.swap(queue,j,k); =*MR(b>
k = j; vrIV%l=
} Rlw3!]5+2
} Z^_>A)<s<
Ft-6m%
} x)viY5vjH
I:;+n^N?
} ]b1Li}
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SortUtil： *\ECf.7jz
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package org.rut.util.algorithm; 6 =>G#
! D1zXXq
import org.rut.util.algorithm.support.BubbleSort; Gp|JU Fo
import org.rut.util.algorithm.support.HeapSort; =/Juh7[C
import org.rut.util.algorithm.support.ImprovedMergeSort; ^gg!Me
import org.rut.util.algorithm.support.ImprovedQuickSort; E(Gr0#8
import org.rut.util.algorithm.support.InsertSort; eyB_l.U7
import org.rut.util.algorithm.support.MergeSort; F(4yS2h(
import org.rut.util.algorithm.support.QuickSort; rsxRk7s@
import org.rut.util.algorithm.support.SelectionSort; z7=fDe -
import org.rut.util.algorithm.support.ShellSort; =5s$qb?#
0dt"ZSm
/** >oY^Gx
* @author treeroot -c={+z "
* @since 2006-2-2 pVG>A&4
* @version 1.0 W~dE
*/ CeW7Ym
public class SortUtil { p":zrf'(6
public final static int INSERT = 1; U[fSQ`&D
public final static int BUBBLE = 2; O),I[kb
public final static int SELECTION = 3; vLn> 4SK
public final static int SHELL = 4; x0G>ktWq<
public final static int QUICK = 5; JlIS0hnv
public final static int IMPROVED_QUICK = 6; vttrKVA
public final static int MERGE = 7; >\bPZf)tJ)
public final static int IMPROVED_MERGE = 8; Vy;_GfT$
public final static int HEAP = 9; T`Hw49
+x]e-P%
public static void sort(int[] data) { - L`7+
sort(data, IMPROVED_QUICK); k3yxx]Rk/
} kI+b <$:D
private static String[] name={ Qp+lJAY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3B#!2|
}; 0/Q5d,'Y[2
'j#a%j@{
private static Sort[] impl=new Sort[]{ \+]O*Bm&`8
new InsertSort(), ?>?ZAr
new BubbleSort(), _85E=
new SelectionSort(), viV-e$s`.
new ShellSort(), P^4'|#~2T
new QuickSort(), =|JKu'
new ImprovedQuickSort(), gA+YtU{z
new MergeSort(), hht+bpHl
new ImprovedMergeSort(), +Ag#B*
new HeapSort() k2uBaj]
}; t>oM%/H
0UjyMEiK
public static String toString(int algorithm){ Q)dT(Td9~
return name[algorithm-1]; H%T3Pc
} )"~=7)~<^
V"g~q?@F
public static void sort(int[] data, int algorithm) { R `Q?J[e
impl[algorithm-1].sort(data); 0 r3N^_}
} 8;.` {'r
P:a*t[+
public static interface Sort { *NjMb{[ZQ
public void sort(int[] data); 1gAc,s2
} z1qUz7
05g?jV
public static void swap(int[] data, int i, int j) { my=~"bw4
int temp = data; 9/H^t*5t
data = data[j]; x`3.Wu\
data[j] = temp; P.1Qc)m4
} d!!3"{'
} +1f{_v