[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; ,Ds.x@p
} b-5y9K
int i1=l; v}JD2.O+
int i2=mid+1; 8P' ana
for(int cur=l;cur<=r;cur++){ ?Ke eHMu
if(i1==mid+1) ,YYVj{~2
data[cur]=temp[i2++]; Vy<HA*
else if(i2>r) V7Yaks
data[cur]=temp[i1++]; 9nSWE W
else if(temp[i1] data[cur]=temp[i1++]; sq/]wzT:
else bO5k6i
data[cur]=temp[i2++]; ZAKeEm2A
} >ezi3Zx^
} 5sO@OV\ y
.4y>QN#VL
} Y]|:?G7l]
vV?rpe|%
改进后的归并排序: E ]9\R
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package org.rut.util.algorithm.support; Mj=$y?d ]
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import org.rut.util.algorithm.SortUtil; 0C%W&;r0
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/** E.bi05l
* @author treeroot aolN<u3G
* @since 2006-2-2 Fm_y&7._
* @version 1.0 BP[|nL
*/ $ <8~k^
public class ImprovedMergeSort implements SortUtil.Sort { VZn=rw
UO Ug4
private static final int THRESHOLD = 10; sZgRt
'J)2g"T@
/* G9P!_72
* (non-Javadoc) /t<@"BoV
* D('2p8;2"7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +k<w!B*
*/ $!@\
public void sort(int[] data) { R8ONcG
int[] temp=new int[data.length]; U:6W+p8
mergeSort(data,temp,0,data.length-1); @wmi5oExc
} [P4$Khu$
QYb33pN|
private void mergeSort(int[] data, int[] temp, int l, int r) { )jrT6x^IB
int i, j, k; RkeltE~u
int mid = (l + r) / 2; =SOe}!
if (l == r) _?voU
return; '|>9C^E9X
if ((mid - l) >= THRESHOLD) 0H_!Kg
mergeSort(data, temp, l, mid); W/ay.I
else c?2MBtnu
insertSort(data, l, mid - l + 1); $h[QQ-
if ((r - mid) > THRESHOLD) r`S< A;
mergeSort(data, temp, mid + 1, r); :p&!RI(l
else ''OfS D_g
insertSort(data, mid + 1, r - mid); Qe"pW\
#%@*p,xh
for (i = l; i <= mid; i++) { 6(|d|Si *c
temp = data; d@0Kr5_
} y4:H3Sk
for (j = 1; j <= r - mid; j++) { 1'v5/
temp[r - j + 1] = data[j + mid]; nz1'?_5
} #3=P4FUz.
int a = temp[l]; 5l-mW0,MK
int b = temp[r]; iTh:N2/-vc
for (i = l, j = r, k = l; k <= r; k++) { y)c5u%(
if (a < b) { Dq@2-Cv
data[k] = temp[i++]; 'uDjFQX
a = temp; jDM w2#<
} else { *1Z5+uVT[
data[k] = temp[j--]; ;!< Znw
b = temp[j]; ,5Pl\keY
} ,bE$| x'
} mnk"Vr` L
} q}BzyC=:n
]{~NO{0@Y
/** 1=7jz]t
* @param data e}VBRvr
* @param l t2" (2
* @param i Do%-B1{ri
*/ Z4$cyL'$P
private void insertSort(int[] data, int start, int len) { d1@%W;qX!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9~rUkHD
} w=h1pwY
} 9mc!bj^811
} mV73 \P6K
} wv QMnE8\
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堆排序： -V"22sR]
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package org.rut.util.algorithm.support; [OTJVpC
,h\sF#|
import org.rut.util.algorithm.SortUtil; :!;'J/B@..
\k`n[{
/** BG^C9*ZuP
* @author treeroot 8l?piig#
* @since 2006-2-2 !|q<E0@w\
* @version 1.0 Mr--4D0Hk
*/ ;g_> ;tR/
public class HeapSort implements SortUtil.Sort{ GhY1k";
}ZSQ>8a
/* (non-Javadoc) @UBjq%z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bb42v7?
*/ Ogt]_
public void sort(int[] data) { C.^Ven
MaxHeap h=new MaxHeap(); thO ~=RB
h.init(data); ]u-]'P
for(int i=0;i h.remove(); LIU}a5
System.arraycopy(h.queue,1,data,0,data.length); Ee1LO#^_6
} =@u 5|:
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private static class MaxHeap{ Dlo xrdOY&
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void init(int[] data){ "xMD,}+5$$
this.queue=new int[data.length+1]; YI-O{U
for(int i=0;i queue[++size]=data; }7G8|54t
fixUp(size); =K&\E2kA4
} RO0>I8c1c
} mDGn:oRj
KV|}#<dD
private int size=0; -S,ln
+5.t. d
private int[] queue; Uw-p758dD
;U: {/
public int get() { $qF0ltUQ
return queue[1]; vhvdKD
} [U#72+K
,y9iKkg
public void remove() { 8,O33qwH
SortUtil.swap(queue,1,size--); 2eeQ@]Wj[Z
fixDown(1); G5dO 3lwq
} n\I#CH0V
file://fixdown B,z<%DAE
private void fixDown(int k) { P3 c\S[F
int j; qj01]
while ((j = k << 1) <= size) { k{tMzx]F__
if (j < size %26amp;%26amp; queue[j] j++; SxyONp.$\
if (queue[k]>queue[j]) file://不用交换 wOQ#N++C
break; 4>^K:/y
SortUtil.swap(queue,j,k); 'tN25$=V&W
k = j; 4GG>!@|
} o!Ev;'D
} Cp^@zw*/
private void fixUp(int k) { 0Iud$Lu
while (k > 1) { y5= `ap
int j = k >> 1; 5_0(D;Q
if (queue[j]>queue[k]) 6b8;}],|
break; %or,{mmiM:
SortUtil.swap(queue,j,k); H?}[r)|(3i
k = j; V~GWl1#7
} J68j=`Y
} UV}73Sp
>$gG/WD?KR
} O_$dI*RK
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} *O:r7_ Y0
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SortUtil： MyJ4><oG
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package org.rut.util.algorithm; 0.r4f'vk
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import org.rut.util.algorithm.support.BubbleSort; @=w<B4L
import org.rut.util.algorithm.support.HeapSort; )f+U~4G&
import org.rut.util.algorithm.support.ImprovedMergeSort; +u@aJ_^
import org.rut.util.algorithm.support.ImprovedQuickSort; YL jHt\
import org.rut.util.algorithm.support.InsertSort; QQk{\PV
import org.rut.util.algorithm.support.MergeSort; o sbHs$C
import org.rut.util.algorithm.support.QuickSort; z sQo$p
import org.rut.util.algorithm.support.SelectionSort; EG'[`<*h
import org.rut.util.algorithm.support.ShellSort; ~5ZvOX6L2
-B#yy]8
/** [LT^sb
* @author treeroot v]2S`ffP
* @since 2006-2-2 e]ig!G]
* @version 1.0 qo+N,x9o
*/ HhA -[p
public class SortUtil { kH*Pn'
public final static int INSERT = 1; Jxf~&!zR
public final static int BUBBLE = 2; w)E@*h<Z
public final static int SELECTION = 3; !.7udYmB
public final static int SHELL = 4; |( (zTf
public final static int QUICK = 5; 6nDV1O5
public final static int IMPROVED_QUICK = 6; C8@TZ[w
public final static int MERGE = 7; r%wA&FQ8U
public final static int IMPROVED_MERGE = 8; d "BW/%m|g
public final static int HEAP = 9; iK;dU2h
M"q[p
public static void sort(int[] data) { k.h`Cji@
sort(data, IMPROVED_QUICK); (VyNvB
} puSLqouTM
private static String[] name={ "wH)mQnd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M|T4~Q U&
}; F0~k1TDw
vv6$>SU
private static Sort[] impl=new Sort[]{ W[[oSqp
new InsertSort(), W#_/ak$uF*
new BubbleSort(), 5_K5?N
new SelectionSort(), 39e;
new ShellSort(), @e~]t}fH
new QuickSort(), L;_c|\%
new ImprovedQuickSort(), \^+ILYO:$
new MergeSort(), z;]CmR@Ki
new ImprovedMergeSort(), >1L=,M
new HeapSort() y;" n9
}; P`$12<\O1
pl*~kG=
public static String toString(int algorithm){ y-?>*fNo
return name[algorithm-1]; TL= YQA
} >: 0tA{bV
Zr$d20M2A;
public static void sort(int[] data, int algorithm) { (A k\Lm
impl[algorithm-1].sort(data); Qz<d~N
} QrD o|GtE
K5 3MMH[q#
public static interface Sort { kg5ev8
public void sort(int[] data); pvWau1ArNq
} ,7]k fB
^jdL@#k00
public static void swap(int[] data, int i, int j) { h>S[^ -,
int temp = data; ofc.zwH
data = data[j]; U3;aLQ*
data[j] = temp; -P=g3Q i
} s}M= oe
} hVoNw6fE