[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; z|?R=;,u`
} Po4cbFZ
int i1=l; aC$g(>xFt
int i2=mid+1; B+DRe 8
for(int cur=l;cur<=r;cur++){ \j;uN#)28
if(i1==mid+1) cnPXvD^kY
data[cur]=temp[i2++]; lM1!2d'P
else if(i2>r) R39R$\
data[cur]=temp[i1++]; ;VFr5.*x
else if(temp[i1] data[cur]=temp[i1++]; lqCn5|S]
else g^4FzJ
data[cur]=temp[i2++]; rYS D-Kq
} eo_T.q
} 0amz#VIB<u
1DcarF
} k51s*U6=
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改进后的归并排序: 8W[]#~77b
enzQ}^
package org.rut.util.algorithm.support; MHYf8HN
2,;t%GB
import org.rut.util.algorithm.SortUtil; $B?7u@>,
D5m\u$~V
/** RZtL<2.@
* @author treeroot uY~A0I5Z
* @since 2006-2-2 Bw=[g&+o1@
* @version 1.0 85{vz|(':
*/ ~&/Gx_KU
public class ImprovedMergeSort implements SortUtil.Sort { .>'Z9.Xnk
9h(hx7]
private static final int THRESHOLD = 10; dJ^`9W
G0Eq}MyF
/* YcV~S#b
* (non-Javadoc) (*x"6)`
* k0IU~y%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ] zY
*/ WO9/rF_
public void sort(int[] data) { Wu&Di8GhP
int[] temp=new int[data.length]; u"gp">
mergeSort(data,temp,0,data.length-1); dR+$7N$
} *a%PA(%6
"\[>@_p h
private void mergeSort(int[] data, int[] temp, int l, int r) { pzr-}>xrZ
int i, j, k; Pvw%,=41O
int mid = (l + r) / 2; S%fBt?-Cm
if (l == r) z.^ )r
return; k-e@G'
if ((mid - l) >= THRESHOLD) T_Y}1n|7[
mergeSort(data, temp, l, mid); 8W>l(w9M
else dSZ#,Ea"
insertSort(data, l, mid - l + 1); 5w1[KO#K|
if ((r - mid) > THRESHOLD) X8x>oV;8
mergeSort(data, temp, mid + 1, r); ~\G3l,4
else sD3|Qj;
insertSort(data, mid + 1, r - mid); 8!SiTOzR?
__iyBaX
for (i = l; i <= mid; i++) { \^4$}@*]
temp = data; o?FUVK
} (`+Z'Y
for (j = 1; j <= r - mid; j++) { xlO2jSSAt
temp[r - j + 1] = data[j + mid]; SXz([Z{)
} }aM`Jp-O
int a = temp[l]; w0Y%}7
int b = temp[r]; !S-U8KI|
for (i = l, j = r, k = l; k <= r; k++) { UYOn p7R<
if (a < b) { <pUou
data[k] = temp[i++]; <;e#"(7
a = temp; XE*bRTEw
} else { *^Y0}?]qT
data[k] = temp[j--]; 3raA^d3!?
b = temp[j]; ^b %8_?2m
} J"%}t\Q
} T_[\(K`w!
} oLMi vy4
CWQ2iu<_0
/** m5aaY
* @param data I7^X;Q F
* @param l a?~csP^?}
* @param i F5MPy[
*/ [B @j@&
private void insertSort(int[] data, int start, int len) { ug"<\"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H;|:r[d!
} )N6[rw<
} a&"*UJk<?
} H`lD@q'S
} "@w%TcA
E}9ldM=]s
堆排序： ](:FW '-
c|( ?
package org.rut.util.algorithm.support; ~9{;VKgK
>1G*ya)
import org.rut.util.algorithm.SortUtil; p30&JJ!~"
/t)c fFM
/** GTe:k
* @author treeroot ca*[n~np
* @since 2006-2-2 yGGB
* @version 1.0 p3FnYz-V
*/ vcO`j<`
public class HeapSort implements SortUtil.Sort{ \N , '+
8Vhck-wF
/* (non-Javadoc) X6GkJ R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $uK"@Mw
*/ 6n\z53Mk
public void sort(int[] data) { A'QGTT
MaxHeap h=new MaxHeap(); Wx)U<:^e
h.init(data); fR%1FXpK&
for(int i=0;i h.remove(); qK vr*xlC
System.arraycopy(h.queue,1,data,0,data.length); _JTxm>
} uo'31V0
0(/D|
private static class MaxHeap{ /NX7Vev
`{lAhZ5
void init(int[] data){ Guw|00w,Q$
this.queue=new int[data.length+1]; ,]_(-tyN|
for(int i=0;i queue[++size]=data; k5;Vl0Ho
fixUp(size); KI@
} xf"5<PTW</
} E+ 3yN\X(
Df:7P>
private int size=0; A a} o*
uoY`qF.`
private int[] queue; _pko]F|()
Vy^yV|`v
public int get() { 3u0<v%Qi
return queue[1]; /dJ)TW(Ir
} #t2UPLO~
]ZzG!7
public void remove() { q6JW@GT
SortUtil.swap(queue,1,size--); tb?F}MEe
fixDown(1); Z<|_+7T
} Iei7!KLW
file://fixdown wEnuUC4j
private void fixDown(int k) { Sja{$zL+W
int j; WCmNibj
while ((j = k << 1) <= size) { m_!vIUOz
if (j < size %26amp;%26amp; queue[j] j++; Jp3di&x
if (queue[k]>queue[j]) file://不用交换 Qj<{oZp&
break; YG 5Z8@kH
SortUtil.swap(queue,j,k); 0SYf<$
k = j; _p J_V>l
} ca/o#9:N`:
} =PFR{=F
private void fixUp(int k) { nOal7BNN
while (k > 1) { b?]ly(
int j = k >> 1; yvooM'R
if (queue[j]>queue[k]) k/_8!^:'
break; (ND5CKCR^
SortUtil.swap(queue,j,k); e4=FU&RpNH
k = j; >PJtG]D
} {#1j"
} ,d>X/kd|o
?7kV+{.
} @9uYmkcV
g7 Md
} -e{)v'C)
oa &z/`@
SortUtil： 9U=fJrj'u
5Hwo)S]r
package org.rut.util.algorithm; ? %+VG
Uc&6=5~Ys\
import org.rut.util.algorithm.support.BubbleSort; D,dHP-v
import org.rut.util.algorithm.support.HeapSort; +-aU+7tu
import org.rut.util.algorithm.support.ImprovedMergeSort; \7t5U7v8U
import org.rut.util.algorithm.support.ImprovedQuickSort; 833%H`jQc
import org.rut.util.algorithm.support.InsertSort; uojh%@.4
import org.rut.util.algorithm.support.MergeSort; Q\27\2
import org.rut.util.algorithm.support.QuickSort; jKj=#O
import org.rut.util.algorithm.support.SelectionSort; p`ADro*
import org.rut.util.algorithm.support.ShellSort; b@wBR9s
C,{F0-D
/** xA&
* @author treeroot pG!(6V-x<E
* @since 2006-2-2 nrTv=*tDj
* @version 1.0 h eE'S/
*/ WjY{rM,K
public class SortUtil { vr{'FMc
public final static int INSERT = 1; fwi};)K
public final static int BUBBLE = 2; 1C0Y0{6,
public final static int SELECTION = 3; 3'[Rvy{
public final static int SHELL = 4; vQKn=
public final static int QUICK = 5; <o&o=Y8
public final static int IMPROVED_QUICK = 6; DIG0:)4R.
public final static int MERGE = 7; Jtp>m?1Ve
public final static int IMPROVED_MERGE = 8; [;?"R-V"z
public final static int HEAP = 9; jcEs10y
f`hyYp`d5
public static void sort(int[] data) { egI{!bZg'\
sort(data, IMPROVED_QUICK); ,pyQP^u-
} QGH h;
private static String[] name={ 1m>^{u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |oe!P}u
}; ?{ B[^
TsaW5ho<p
private static Sort[] impl=new Sort[]{ g>~cs_N@
new InsertSort(), (VYR!(17
new BubbleSort(), DO&+=o`"
new SelectionSort(), 83KfM!w
new ShellSort(), h_&4p=SQ
new QuickSort(), 3z,v#2
new ImprovedQuickSort(), _{6,.TN
new MergeSort(), ~LawF_]6
new ImprovedMergeSort(), I!fB1aq-
new HeapSort() cq*p9c
}; lo+xo;Nd
`E3:;|
public static String toString(int algorithm){ 2Vp>"
return name[algorithm-1]; X,RT<GNNb
} (TEo_BW|+
${hyNt
public static void sort(int[] data, int algorithm) { R9tckRG#
impl[algorithm-1].sort(data); |H ^w>mk
} !}>eo2$r^
F2IC$:e M
public static interface Sort { '8)Wd"[
public void sort(int[] data); 9?uqQ
} :O9P(X*
Mn]}s:v
public static void swap(int[] data, int i, int j) { G*i.a*9<)
int temp = data; ?SC3Vzr
data = data[j]; uu}a:qrY
data[j] = temp; m_Mwg
} Z0e-W:&;kF
} O6yP qG*j