[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; =B`=f,,#3
} .Q{VY]B^
int i1=l; '5A&c(
int i2=mid+1; _bv9/#tR
for(int cur=l;cur<=r;cur++){ z uo:yaO
if(i1==mid+1) KI].T+I
data[cur]=temp[i2++]; !Q}Bz*Y
else if(i2>r) BQv*8Hg B6
data[cur]=temp[i1++]; 8|u8J0^
else if(temp[i1] data[cur]=temp[i1++]; jN(c`Gb
else Tt_QAIl
data[cur]=temp[i2++]; .3SP#mI
} ! GtF%V
} -I z,vd
:c(I-xif
} dsK*YY jH
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改进后的归并排序: f1B t6|W%
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package org.rut.util.algorithm.support; o*[[nK*fL
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import org.rut.util.algorithm.SortUtil; YpG6p0 nd
q9\(<<f|
/** :3b\pEO9\
* @author treeroot .$+,Y4q~(
* @since 2006-2-2 3GMrdG?Y
* @version 1.0 76u\#{5
*/ dV^ck+
public class ImprovedMergeSort implements SortUtil.Sort { j*~z.Q|
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private static final int THRESHOLD = 10; 4F!%mMq
"y ;0}9]n1
/* jS|jPk|I.
* (non-Javadoc) ,o0[^-b<
* ?9T,sX:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R[#B|$
*/ R$">
public void sort(int[] data) { KB{/L5
int[] temp=new int[data.length]; n8q%>.i7
mergeSort(data,temp,0,data.length-1); Z5*O\kJv
} /<J5?H
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private void mergeSort(int[] data, int[] temp, int l, int r) { YdYaLTz
int i, j, k; qy-Hv6oof
int mid = (l + r) / 2; UY)Iu|~0b
if (l == r) :Z6l)R+V
return; xo(>nFjo
if ((mid - l) >= THRESHOLD) kZcGe*
mergeSort(data, temp, l, mid); N0YJ'.=8,
else awLSY:JI
insertSort(data, l, mid - l + 1); GwG(?_I"
if ((r - mid) > THRESHOLD) MEtKFC|p
mergeSort(data, temp, mid + 1, r); ]XWtw21I1
else D/z*F8'c
insertSort(data, mid + 1, r - mid); jk])S~xl?
ph3dm\U.
for (i = l; i <= mid; i++) { C2L=i3R
temp = data; g&/r =U
} V|4k=_-
for (j = 1; j <= r - mid; j++) { .G/RQn]x}
temp[r - j + 1] = data[j + mid]; |KSoS#Y
} oCKn
int a = temp[l]; +@do<2l]
int b = temp[r]; (cp$poo
for (i = l, j = r, k = l; k <= r; k++) { QD 0p
if (a < b) { i}C%`1+(
data[k] = temp[i++]; Qs 'dwc
a = temp; NH,4>mV$!
} else { %D ,(S-Uj
data[k] = temp[j--]; !!])~+4pP
b = temp[j]; d81[hT}q
} h|EHK!<"8
} x`K"1E{2
} rWp+kV[Ec>
:ZXaJ!
/** 7[M@;$
* @param data z~jk_|?|?
* @param l &qm:36Y7Xg
* @param i -)e(Qt#ewl
*/ %,udZyO3uR
private void insertSort(int[] data, int start, int len) { }jL4F$wC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ItG|{Bo
} n&E/{o(
} eM^Y
} [t]q#+Zs
} n%{oFTLCo
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堆排序： V|;os
D ~NWP%H
package org.rut.util.algorithm.support; B\>3[_n
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import org.rut.util.algorithm.SortUtil; zzX9Q:
@Z@S;RWSU
/** NOtwgZ-
* @author treeroot Y_nlIcu
* @since 2006-2-2 -M-y*P)
* @version 1.0 f/i[? gw
*/ \>e>J\t:
public class HeapSort implements SortUtil.Sort{ deutY.7g
T{Yk/Z/}?
/* (non-Javadoc) *35o$P46
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wtfM}MW\
*/ v3]~*\!5
public void sort(int[] data) { buxyZV@1
MaxHeap h=new MaxHeap(); U,,rB(
h.init(data); P}D5 j
for(int i=0;i h.remove(); XKbTjR
System.arraycopy(h.queue,1,data,0,data.length); S@C"tHD
} <##aD3)
'WoB\y569
private static class MaxHeap{ P1"g62R
.Mzrj{^Y
void init(int[] data){ vpu
this.queue=new int[data.length+1]; NqN9
for(int i=0;i queue[++size]=data; 83:qIfF
fixUp(size); \3cg\Q+~
} OLDEB.@
} UG,n q
{ALOs^_-
private int size=0; TK#-;p_
Oz.Zxw
private int[] queue; \LDcIK=
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public int get() { (9!kKMQW'
return queue[1]; :$oiP
} 15!b]':
`wNJ*`
public void remove() { i$4lBy_2
SortUtil.swap(queue,1,size--); A Zv| |8p
fixDown(1); "C9.pdP\8
} "'6R|<u=:
file://fixdown 2$oGy
private void fixDown(int k) { CIf""gL9
int j; ]w9syz8X
while ((j = k << 1) <= size) { s_`y"'^
if (j < size %26amp;%26amp; queue[j] j++; KnYHjJa
if (queue[k]>queue[j]) file://不用交换 z';h5GNd>z
break; $dHD
SortUtil.swap(queue,j,k); w7_2JS
k = j; )"y]_}
} +F6R@@rWr
} A*3R@G*h
private void fixUp(int k) { 8hvh xp
while (k > 1) { L&~>(/*7U
int j = k >> 1; l,1.6
if (queue[j]>queue[k]) iTeFy-Ct
break; 7R".$ p
SortUtil.swap(queue,j,k); Mer\W6e"e
k = j; pPZ^T5-ks
} 0mR
} 2)>Ty4*
w7h=vy n?
} AmT*{Fz8
tqK}KL
} 2&U<Wiu\}
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SortUtil： pXHeUBY.
:a9$f8*b
package org.rut.util.algorithm; 58_aI?~>>
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import org.rut.util.algorithm.support.BubbleSort; 2v\-xg%1
import org.rut.util.algorithm.support.HeapSort; SQx:`{O
import org.rut.util.algorithm.support.ImprovedMergeSort; 7j%sM&
import org.rut.util.algorithm.support.ImprovedQuickSort; MYeGr3V3
import org.rut.util.algorithm.support.InsertSort; c9;oB|8|
import org.rut.util.algorithm.support.MergeSort; ?8)$N
import org.rut.util.algorithm.support.QuickSort; Dv+:d4|"
import org.rut.util.algorithm.support.SelectionSort; `z3"zso
import org.rut.util.algorithm.support.ShellSort; BcD%`vGJ
*g/@-6
/** 2E}^'o
* @author treeroot =;HmU.Uek%
* @since 2006-2-2 +v'n[xa1v
* @version 1.0 `pd1'5Hm
*/ ;V3d"@R,
public class SortUtil { `o!a RX
public final static int INSERT = 1; +)K yG
public final static int BUBBLE = 2; {v}jV{'^um
public final static int SELECTION = 3; b1qli5
public final static int SHELL = 4; d@t3C8
public final static int QUICK = 5; y2Z1B2E%f
public final static int IMPROVED_QUICK = 6; vR"<:r47?
public final static int MERGE = 7; hTbot^/
public final static int IMPROVED_MERGE = 8; @;@Wt`(2a
public final static int HEAP = 9; N\dr_
SvGs?nUU
public static void sort(int[] data) { s *1%I$=@
sort(data, IMPROVED_QUICK); E|Z7art
} ._z[T@!9
private static String[] name={ pvJPMx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S~DY1e54GF
}; ihdtq
b`sph%&
private static Sort[] impl=new Sort[]{ EaGS}=qY5
new InsertSort(), Y^f12%
new BubbleSort(), [M6/?4\
new SelectionSort(), r#[YBaCZJ
new ShellSort(), /q8?xP.
new QuickSort(), >w=xGb7
new ImprovedQuickSort(), D?"TcA
new MergeSort(), }~28UXb23
new ImprovedMergeSort(), >xE{& ):
new HeapSort() /1q] D8
}; mDp|EXN
MhpR^VM'.
public static String toString(int algorithm){ $R<eXDW6:
return name[algorithm-1]; DweWFipyPi
} \i#0:3s.
+C !A@
public static void sort(int[] data, int algorithm) { >, }m=X8
impl[algorithm-1].sort(data); K06/ D!RD4
} yw;!KUKb|
".SQ*'Oc
public static interface Sort { 6Pa jBEF
public void sort(int[] data); 'Kj8X{BSFb
} M^^u{);q
OAQ'/{~7
public static void swap(int[] data, int i, int j) { ,FPgbs
int temp = data; +>5 "fs$Y
data = data[j]; \lleO|m
data[j] = temp; D:HeP:.I
} cNG6 A4
} 2v<[XNX