[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; SiD [54OM
} oGK 1D
int i1=l; }RGp)OFY&
int i2=mid+1; pa7Iz^i
for(int cur=l;cur<=r;cur++){ uP'x{Pr)
if(i1==mid+1) +) pO82
data[cur]=temp[i2++]; '>GZB
else if(i2>r) 9~6FWBt
data[cur]=temp[i1++]; $"+ahS<?tC
else if(temp[i1] data[cur]=temp[i1++]; a0vg%Z@!
else De^GWO.?bT
data[cur]=temp[i2++]; YS}uJ&WoF
} e}Y|'bG
} g$++\%k&
MX=mGfoa
} Kr$ w"]
3Mvm'T:[
改进后的归并排序: -y8?"WB(b
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package org.rut.util.algorithm.support; `|p3@e
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import org.rut.util.algorithm.SortUtil; B&l5yI b
L'1p]Z"
/** DEGEr-
* @author treeroot Ms^U`P^V~P
* @since 2006-2-2 :hre|$@{a
* @version 1.0 E!d;ym
*/ r!qr'Ht<
public class ImprovedMergeSort implements SortUtil.Sort { Iz'*^{Ssm
!N6/l5kn
private static final int THRESHOLD = 10; Up61Xn
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/* &zl=}xeA
* (non-Javadoc) N:#"4e
* u$7od$&S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pi>,>-Z
*/ t)Iu\bP
public void sort(int[] data) { '\I.P
int[] temp=new int[data.length]; p'lL2n$E
mergeSort(data,temp,0,data.length-1); !,rp|
} gZ!vRO<%
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private void mergeSort(int[] data, int[] temp, int l, int r) { YlI/~J
int i, j, k; YT)jBS~&
int mid = (l + r) / 2; O|t@p=]
if (l == r) fc'NU(70c
return; faqOGAb
if ((mid - l) >= THRESHOLD) nf,R+oX
mergeSort(data, temp, l, mid); CzP?J36W^
else 3`ov?T(H
insertSort(data, l, mid - l + 1); nLn3kMl4
if ((r - mid) > THRESHOLD) b' 1%g}
mergeSort(data, temp, mid + 1, r); oy I8}s:
else Tw:j}ERq
insertSort(data, mid + 1, r - mid); 2}Ga
z1LN|+\}
for (i = l; i <= mid; i++) { 0dv# [
temp = data; xPFNH`O&
} OH2Xxr[bQ
for (j = 1; j <= r - mid; j++) { 2s(c#$JVS
temp[r - j + 1] = data[j + mid]; dLV>FpA\
} y be:u
int a = temp[l]; V%F^6ds$]0
int b = temp[r]; ;pK/t=$
for (i = l, j = r, k = l; k <= r; k++) { #KC& ct
if (a < b) { MP5 vc5[
data[k] = temp[i++]; -;/;dz;
a = temp; LvlVZjT
} else { >w,o|
data[k] = temp[j--]; R`? '|G]P
b = temp[j]; 0 K T.@P
} q;&\77i$
} FerQA9K)x
} lTl-<E;
Czj]jA(0f
/** fq-zgqF<
* @param data 3lw KV
* @param l (;RmfE'PX
* @param i "bI'XaSv
*/ )%8;C]G;
private void insertSort(int[] data, int start, int len) { c{YBCWA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aRPpDSR?l
} W(^R-&av
} G}!dm0s$
} ~Z74e>V%
} _J'V5]=4
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堆排序： oD_n+95B
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package org.rut.util.algorithm.support; )f#raXa5+
blbL49;
import org.rut.util.algorithm.SortUtil; o:`>r/SlL
AfU~k!4`
/** WCK;r{p%I
* @author treeroot FW](GWp`:
* @since 2006-2-2 S8+GM
* @version 1.0 Q8]lz}
*/ L9,;zkgo
public class HeapSort implements SortUtil.Sort{ 0L3v[%_j"
O=2"t%Gc
/* (non-Javadoc) {0a (R2nB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xq#YBi,
*/ du,mbTQib
public void sort(int[] data) { [sxJ<
MaxHeap h=new MaxHeap(); ,,U8X [A
h.init(data); oD0WHp
for(int i=0;i h.remove(); uc>u=kEue
System.arraycopy(h.queue,1,data,0,data.length); in>Os@e#
} z?ck*9SZX
l*~".q;S
private static class MaxHeap{ M1{ru~Z9
'@~\(SH
void init(int[] data){ \Y37wy4
this.queue=new int[data.length+1]; m tPmVze
for(int i=0;i queue[++size]=data; cV=0)'&<`_
fixUp(size); O+8]y4%5
} u"WqI[IV
} "x;|li3;
3aD\J_
private int size=0; 0l.\KF
'/2u^&W
private int[] queue; pDw^~5P
,C4gA(')K
public int get() { |wef[|@%
return queue[1]; |f9fq~'1e
} {jnfe}]
<oFZFlY@
public void remove() { =f FTi1]/h
SortUtil.swap(queue,1,size--); E=G"_ ^hCE
fixDown(1); Zo=w8Hr
} I.C,y\
file://fixdown NeG$;z7
private void fixDown(int k) { y(^hlX6gQ
int j; Or {9?;G
while ((j = k << 1) <= size) { #3fS_;G
if (j < size %26amp;%26amp; queue[j] j++; MST\_s%[
if (queue[k]>queue[j]) file://不用交换 mpsi{%gA
break; l,}^<P]
SortUtil.swap(queue,j,k); =g]Ln)jc
k = j; R 4= ~
} itH` s<E
} 17hFwo`
private void fixUp(int k) { ';HNQe?vT
while (k > 1) { k15fy"+Ut
int j = k >> 1; hv]}b'M$
if (queue[j]>queue[k]) orT%lHwjL
break; wD*z >v$
SortUtil.swap(queue,j,k); !(%^Tg=
k = j; m+jW+
} Cf~H9
} TGSUbBgU
#kmZS/"
} N;\G=q] 9
>~+'V.CNW
} CLQE@kF;
;%#.d$cU
SortUtil： MLd*WpiI.
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package org.rut.util.algorithm; N:4oVi@Je
P#gY-k&Nr
import org.rut.util.algorithm.support.BubbleSort; AK$h SM
import org.rut.util.algorithm.support.HeapSort; [{K
import org.rut.util.algorithm.support.ImprovedMergeSort; ( E8(np
import org.rut.util.algorithm.support.ImprovedQuickSort; ZUkrJ'
import org.rut.util.algorithm.support.InsertSort; :)~idVlV
import org.rut.util.algorithm.support.MergeSort; V~9vf*X
import org.rut.util.algorithm.support.QuickSort; /o/0 9K
import org.rut.util.algorithm.support.SelectionSort; ">-mZ'$#L
import org.rut.util.algorithm.support.ShellSort; :J 7p=sX
?PpGBm2f*
/** Kuj*U'ed7t
* @author treeroot 7 3 Oo;
* @since 2006-2-2 E/<5JhI9~
* @version 1.0 :o2^?k8k&#
*/ TB oN8cB}
public class SortUtil { ~|FKl%
public final static int INSERT = 1; K3CTxU(
public final static int BUBBLE = 2; ?zS t
public final static int SELECTION = 3; J)148/
public final static int SHELL = 4; JGLjx"Y
public final static int QUICK = 5; JA")L0a_
public final static int IMPROVED_QUICK = 6; #z(JYw,
public final static int MERGE = 7; x)^/3
public final static int IMPROVED_MERGE = 8; vX9B^W||x
public final static int HEAP = 9; #]g9O?0$
&efwfnG<
public static void sort(int[] data) { J2vaKl
sort(data, IMPROVED_QUICK); ]j^V5y"
} 2c%*u {=:
private static String[] name={ $@VQ{S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BGe&c,feIc
}; $<]G#&F
C>A*L4c]F
private static Sort[] impl=new Sort[]{ JQ[~N-
new InsertSort(), mbZS J
new BubbleSort(), f^EDiG>b`
new SelectionSort(), /d1 B-I
new ShellSort(), 65@,FDg*i
new QuickSort(), sF+mfoMtG
new ImprovedQuickSort(), KRL9dD,&
new MergeSort(), >k\lE(
new ImprovedMergeSort(), &*w)/W
new HeapSort() 7yp}*b{s
}; e>GX]tK
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public static String toString(int algorithm){ ,hggmzA~
return name[algorithm-1]; N~Kl{">`
} SLj2/B0
x|TLMu=3=
public static void sort(int[] data, int algorithm) { qh40nqS;9
impl[algorithm-1].sort(data); L_k'r\L
} =Nc}XFq
G#|`Bjv"aP
public static interface Sort { L#\!0YW/@
public void sort(int[] data); 0-N"_1k|?
} ;:^^Qfp
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public static void swap(int[] data, int i, int j) { H*h7Y*([
int temp = data; +OM9v3qJ
data = data[j]; 5LIbHSK
data[j] = temp; gM5`UH|
} O|Z5SSlk
} mvCH$}w8&