[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; Vx4pP$S
} 0&L0j$&h
int i1=l; !CMVZf;u
int i2=mid+1; #uw*8&%0
for(int cur=l;cur<=r;cur++){ o-i.'L)X
if(i1==mid+1) %?G.lej,x
data[cur]=temp[i2++]; s8I77._s
else if(i2>r) YrcC"
data[cur]=temp[i1++]; =z/mI y<
else if(temp[i1] data[cur]=temp[i1++]; c$SxDYG
else ~x^+OXf!^g
data[cur]=temp[i2++]; T9;o.f S
} E|A_|FS&%
} }m lbN0v
"BNmpP
} >_%g8T'
P9cI{RI
改进后的归并排序: z^GGJu%vjr
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package org.rut.util.algorithm.support; laL4ez
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import org.rut.util.algorithm.SortUtil; C5z
m?CjYqvf
/** $MEbePxe
* @author treeroot {]m e?I
* @since 2006-2-2 -a^sX%|Bl
* @version 1.0 ez9M]! 8Lt
*/ fq!6#Usf;i
public class ImprovedMergeSort implements SortUtil.Sort { vlKKPS
Z5^UF2`Q
private static final int THRESHOLD = 10; |2]WA'q
WaK{/6?T,
/* }Mlz\'{
* (non-Javadoc) ]mU*Y:<
* L=Jk"qWV0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YG+Yb{^"
*/ G uI sM
public void sort(int[] data) { /OtQk-E
int[] temp=new int[data.length]; iQj{J1V
mergeSort(data,temp,0,data.length-1); E|}Nj}(*
} rG%_O$_dO
SmEd'YD!J
private void mergeSort(int[] data, int[] temp, int l, int r) { Z]+Xh
int i, j, k; VrL>0d&d
int mid = (l + r) / 2; ^[NmNi*
if (l == r) "_}D{ws1
return; WC&Ltw8
if ((mid - l) >= THRESHOLD) ,<WykeC
mergeSort(data, temp, l, mid); g}j>;T
else DLQ`<aU
insertSort(data, l, mid - l + 1); I8>1RXz
if ((r - mid) > THRESHOLD) [5:7WqB
mergeSort(data, temp, mid + 1, r); /9#jv]C:
else I:7,CV
insertSort(data, mid + 1, r - mid); -~aEqj#?
juZ3""
for (i = l; i <= mid; i++) { _NN{Wk/3w
temp = data; P@![P Ij
} ~ a&j4E
for (j = 1; j <= r - mid; j++) { bg. KkJMrR
temp[r - j + 1] = data[j + mid]; {v'Fg
} }u)GERWO
int a = temp[l]; *\+'tFT6
int b = temp[r]; ;lt;]7
for (i = l, j = r, k = l; k <= r; k++) { j[eEyCW[)
if (a < b) { b,A1(_pzi
data[k] = temp[i++]; 5Rp2O4Z
a = temp; ?uBC{KQ}Y
} else { /Bu5kBC
data[k] = temp[j--]; d> AmM!J
b = temp[j]; iR=aYT~
} ~ZC=!|Q#
} N4NH)x
} 6Ky"4\e
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/** LA Vgf>
* @param data {vlh,0~
* @param l Oz7v hOU
* @param i _n gMC]-T
*/ nuA!Jln_
private void insertSort(int[] data, int start, int len) { J#WPXE+Ds
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,i.P= o
} 5!%/j,?
} #8|NZ6x,
} 0g)mf6}o
} Q;M\P/f
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堆排序： /LzNr0>2
b)@x@3"O
package org.rut.util.algorithm.support; I@+<[n2
Or|LyQU
import org.rut.util.algorithm.SortUtil; 9hzU@m
(*gpa:Sc
/** &6EfybAt^_
* @author treeroot =@MKU
* @since 2006-2-2 ?xs0J
* @version 1.0 !*-cf$
*/ ~h.B\Sc]Q
public class HeapSort implements SortUtil.Sort{ bhYaG i0
y~[So ,G
/* (non-Javadoc) _m-r}9au
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u] b6>
*/ ;_ton?bF
public void sort(int[] data) { _v,n~a}&
MaxHeap h=new MaxHeap(); g5[3[Z(.
h.init(data); uuB\~ #?T
for(int i=0;i h.remove(); \I]'6N=
System.arraycopy(h.queue,1,data,0,data.length); p}uw-$O
} K-5)Y+| >
UW3F)
private static class MaxHeap{ >?KyPp
KS_d5NvYl
void init(int[] data){ Q0-~&e_'
this.queue=new int[data.length+1]; w6 .HvH-@?
for(int i=0;i queue[++size]=data; `rV,<
fixUp(size); |<$O5b'
} yhmW-#+^e
} 'r CR8>k
f*Bc`+G
private int size=0; w@We,FUJN
j!dklQh0
private int[] queue; \ZH=$c*W
,sK-gw
public int get() { }S4Fy3)
return queue[1]; {HeMdGn9
} kOO2 ?L|Z
"'L SLp
public void remove() { zx*f*L,6F
SortUtil.swap(queue,1,size--); ?1sY S
fixDown(1); x1h!_^(QfF
} =JkSq J)?
file://fixdown T /uu='3
private void fixDown(int k) { i%2K%5{)$D
int j; |zE7W
while ((j = k << 1) <= size) { Pmb`05\
if (j < size %26amp;%26amp; queue[j] j++; S"l&=J2dc
if (queue[k]>queue[j]) file://不用交换 iatQHn>(
break; JI(|sAH
SortUtil.swap(queue,j,k); ,*30Q
k = j; H2}i .
} f?QD##~;
} !Fi)-o
private void fixUp(int k) { {Bx\Z0+'&
while (k > 1) { HZNX1aQ|Q#
int j = k >> 1; v:'y&yS
if (queue[j]>queue[k]) 2+HiaYDZ
break; #]2u!ama
SortUtil.swap(queue,j,k); .:}\Z27-c
k = j; sr4K-|@
} ORNE>6J H
} y-YYDEl
sQw-#f7t
} Sk-Ti\
E_P]f%
} BKk*<WMD
tq[C"| dH
SortUtil： O{PRK5^h
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package org.rut.util.algorithm; 53A=Ogk8S
(,>`\\
import org.rut.util.algorithm.support.BubbleSort; bc-"If Z&
import org.rut.util.algorithm.support.HeapSort; {#MViBhd%
import org.rut.util.algorithm.support.ImprovedMergeSort; d hy=x
import org.rut.util.algorithm.support.ImprovedQuickSort; +;T%7j"wz
import org.rut.util.algorithm.support.InsertSort; Z:}^fZP
import org.rut.util.algorithm.support.MergeSort; +t f=
import org.rut.util.algorithm.support.QuickSort; Vufw:}i+^
import org.rut.util.algorithm.support.SelectionSort; <[Vr(.A
import org.rut.util.algorithm.support.ShellSort; w jF\>
@)}U\=
/** Rp#SqRy`
* @author treeroot =g ]C9'I3
* @since 2006-2-2 QnqX/vnR
* @version 1.0 ,=FYf|Z
*/ U w)1yzX
public class SortUtil { ^VQiq7 xm
public final static int INSERT = 1; r*Mm5QozA
public final static int BUBBLE = 2; |kn}iA@72p
public final static int SELECTION = 3; @0G}Q
public final static int SHELL = 4; O3Uu{'=0
public final static int QUICK = 5; 8^T' a^Wt
public final static int IMPROVED_QUICK = 6; ?~$y3<[
public final static int MERGE = 7; ^U1;5+2G+~
public final static int IMPROVED_MERGE = 8; shD$,! k
public final static int HEAP = 9; |Z<adOg
*+G K?Ga
public static void sort(int[] data) { z9gZ/d
sort(data, IMPROVED_QUICK); *\>&
} +{s^"M2`
private static String[] name={ `JC!uc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OA8pao~H
}; |laqy`D
FUQT,7CA
private static Sort[] impl=new Sort[]{ @[^H*^1|g
new InsertSort(), <rkF2-K,
new BubbleSort(), >U17BGJ.
new SelectionSort(), (HEjmQjE
new ShellSort(), c;WS !.
new QuickSort(), w v1R ]3}
new ImprovedQuickSort(), TS-[p d
new MergeSort(), ."2V:;;
new ImprovedMergeSort(), .]" o-(gB
new HeapSort() /a,q4tD@
}; %V$^CWOy
90q*V%cS
public static String toString(int algorithm){ %Z.!Bm:
return name[algorithm-1]; It4F;Ah
} {uw]s< 6
hAY_dM
public static void sort(int[] data, int algorithm) { [=iq4F'7
impl[algorithm-1].sort(data); }"szL=s
} ,HkJ.6KF
|i|O9^*%
public static interface Sort { $wBUu
public void sort(int[] data); =Vi+wH{xM
} , vR4x:W
}\9qN!ol
public static void swap(int[] data, int i, int j) { Q5Wb)
int temp = data; *2[r?!
data = data[j]; \d6A<(!=v
data[j] = temp; Q>|<R[.7
} V Bg\)r[
} p4/D%*G^`