[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; @4t_cxmD
} W [*Go
int i1=l; 4,,DA2^!
int i2=mid+1; %p48=|+
for(int cur=l;cur<=r;cur++){ _sb~eB~<(
if(i1==mid+1) i:a*6b.U@N
data[cur]=temp[i2++]; -Oi8]Xw^@y
else if(i2>r) @T"-%L8PL
data[cur]=temp[i1++]; [psZc'q
else if(temp[i1] data[cur]=temp[i1++]; lRk_<A
else LR "=(
data[cur]=temp[i2++]; DsB30
} z!M #
} j.&Y'C7GOC
q+znb'i-x
} {q/;G!ON.S
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改进后的归并排序: wBWqibY|
nt]'>eX_}
package org.rut.util.algorithm.support; sYq:2Wn>8Q
{#.<hPXn
import org.rut.util.algorithm.SortUtil; w%?Zb[!&
(@1>G ^%
/** 2 \<u;9
* @author treeroot PNz]L
* @since 2006-2-2 O$nW
* @version 1.0 y6dQ4Whv&
*/ {Rdh4ZKh
public class ImprovedMergeSort implements SortUtil.Sort { g~ii^[W
!kG|BJ$j
private static final int THRESHOLD = 10; ih|;H:"^
=]r2;014
/* !}5f{,.RO
* (non-Javadoc) xHCdtloi?I
* _!_^B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <PFF\NE9
*/ ? 'qyI^m@
public void sort(int[] data) { dVPY07P
int[] temp=new int[data.length]; d A'0'M
mergeSort(data,temp,0,data.length-1); a/v]E]=qI
} F( 4Ue6R
m^\&v0
private void mergeSort(int[] data, int[] temp, int l, int r) { id588Y78
int i, j, k; aX~Jk >a0
int mid = (l + r) / 2; 0~z`>#W,
if (l == r) mrq,kwM
return; YV _ 7 .+A
if ((mid - l) >= THRESHOLD) `T+w5ONn
mergeSort(data, temp, l, mid); bSz@@s.
else =]5f\f6
insertSort(data, l, mid - l + 1); q9H\ $
if ((r - mid) > THRESHOLD) kdWUz(
mergeSort(data, temp, mid + 1, r); !g`I*ZE+e
else ie11syhV"
insertSort(data, mid + 1, r - mid); o*artMkG
oB%_yy+
for (i = l; i <= mid; i++) { hj&~Dn(
temp = data; n!.=05OtX
} Y]*&\Ex"\
for (j = 1; j <= r - mid; j++) { d``wx}#Uk
temp[r - j + 1] = data[j + mid]; Q lA?dXQ
} CPL,QVO9
int a = temp[l]; Q)y5'u qZ
int b = temp[r]; dF09_nw
for (i = l, j = r, k = l; k <= r; k++) { :5['V#(o
if (a < b) { 98)C 7N'
data[k] = temp[i++]; yf;TIh%)=
a = temp; <[D>[
} else { 7p hf
data[k] = temp[j--]; hkyO_ns
b = temp[j]; H] g=( %ok
} 7R7+jL,
} *Wvk~
} r{t6Vv2J
6bc\ )n`
/** \EU^`o+
* @param data Y8^WuN$
* @param l zH Z;Y^{+
* @param i _yUYEq<`
*/ >d=pl}-kOQ
private void insertSort(int[] data, int start, int len) { -Ci&h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ll-QhcC$
} #AB5}rPEI
} ;gZ/i93:Q
} +}M3O]?4
} ;x2o|#`b
g`Cv[Pq?at
堆排序： <G|i5/|7
N6of$p'N
package org.rut.util.algorithm.support; ^e <E/j{~
;@Fb>lBhX
import org.rut.util.algorithm.SortUtil; 8Z_ 4%vUBg
<K<#)mcv
/** +-(,'slov
* @author treeroot 4bp})>}jB
* @since 2006-2-2 '2i !RT-
* @version 1.0 ^9Cu?!xu0
*/ A7%/sMv
public class HeapSort implements SortUtil.Sort{ 'Etq;^H
(xN1?qXB.
/* (non-Javadoc) 2_)UHTwsK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F[$cE
*/ Osm))Ua(
public void sort(int[] data) { d"miPR
MaxHeap h=new MaxHeap(); kE.4 #
h.init(data); GM'yOJo
for(int i=0;i h.remove(); __Ksn^I
System.arraycopy(h.queue,1,data,0,data.length); "O0xh_Nr
} 8{/.1:
D>7J[ Yxg-
private static class MaxHeap{ J{prI;]K
kyvl>I0q@
void init(int[] data){ |%F,n2
this.queue=new int[data.length+1]; ]uypi#[
for(int i=0;i queue[++size]=data; (DY[OIHI
fixUp(size); Xpn\TD<_I
} [2Zy~`*y{
} Wh| T3&
/z4c>)fV
private int size=0; Y8]@y0(
2vLun
private int[] queue; 72"H#dy%U
;h+~xxu=X
public int get() { [RN]?,
return queue[1]; 5|*`} ;/y
} N'9T*&o+
z8awND
public void remove() { <\<o#Vq
SortUtil.swap(queue,1,size--); C$PS@4'U
fixDown(1); wB[f%mHs
} oC49c~`8
file://fixdown -u'"l(n)~
private void fixDown(int k) { S<Gm*$[7
int j; ^M6lF5
while ((j = k << 1) <= size) { ?..BA&zRk
if (j < size %26amp;%26amp; queue[j] j++; &xN+a{&
if (queue[k]>queue[j]) file://不用交换 QJ4$) Fr(
break; `3i>e<m~
SortUtil.swap(queue,j,k); <MkvlLu((o
k = j; Vez8~r3
} N;'c4=M~(
} jK]1X8
private void fixUp(int k) { 2{63:f1c`'
while (k > 1) { 0jlM~H
int j = k >> 1; n.2:fk
if (queue[j]>queue[k]) j\~,Gtn>Z
break; =FhP$r*
SortUtil.swap(queue,j,k); \8QOZjy
k = j; ?l?l<`sTO
} czD"mI!
} 2I}pX9
,7Hyrx`
} <n]PD;.4
v;o1c44;
} k Alxm{
}rfikm
SortUtil： "Mj#P9
Ge-Bk)6
package org.rut.util.algorithm; >lUPOc
VnsV&cx
import org.rut.util.algorithm.support.BubbleSort; v f{{z%3T
import org.rut.util.algorithm.support.HeapSort; ?PMbbqa0
import org.rut.util.algorithm.support.ImprovedMergeSort; +`k30-<P
import org.rut.util.algorithm.support.ImprovedQuickSort; 3PU_STSix
import org.rut.util.algorithm.support.InsertSort; /"?DOsJ.
import org.rut.util.algorithm.support.MergeSort; W<prY
import org.rut.util.algorithm.support.QuickSort; 8(\}\4G_
import org.rut.util.algorithm.support.SelectionSort; s<F*kLib
import org.rut.util.algorithm.support.ShellSort; uW!XzX['
MmjZq
/** lxL.ztL
* @author treeroot ^%9oeT{
* @since 2006-2-2 /Rq\Mgb
* @version 1.0 dE_Xd:>
*/ N:| :L:<1
public class SortUtil { ~h3G}EH
public final static int INSERT = 1; ?<!qF:r:
public final static int BUBBLE = 2; 3Vc}Q'&Y
public final static int SELECTION = 3; rV%T+!n%c
public final static int SHELL = 4; 6[A\cs
public final static int QUICK = 5; mEd2f^R
public final static int IMPROVED_QUICK = 6; 8eS(gKD
public final static int MERGE = 7; Fk/I (Q
public final static int IMPROVED_MERGE = 8; ZgxB7zl//
public final static int HEAP = 9; apk,\L@sZ
T(*,nJi~9
public static void sort(int[] data) { xjo`u:BH
sort(data, IMPROVED_QUICK); Deh3Dtg/k
} /"gRyv
private static String[] name={ 80@\e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bgm8IK)6
}; a(A~S u97
/\/^= j
private static Sort[] impl=new Sort[]{ |?^<=%
new InsertSort(), /Pg)7Zn
new BubbleSort(), r/!,((Z\
new SelectionSort(), n]IF`kYQV
new ShellSort(), }Kgi!$<aQx
new QuickSort(), ~o^|>]
new ImprovedQuickSort(), d,(y$V+
new MergeSort(), CwX?%$S
new ImprovedMergeSort(), G)?*BH
new HeapSort() J.1c,@
}; R xITMt
\yJ 4+vo2Q
public static String toString(int algorithm){ +QFKaS<sn
return name[algorithm-1]; !+PrgIp>
} ISpV={$Zd
y5j:+2|I
public static void sort(int[] data, int algorithm) { :.*Q@X}-I
impl[algorithm-1].sort(data); Zt3sU_
} a|u#w~
ZTzec zXpQ
public static interface Sort { 9<_hb1'
public void sort(int[] data); +x 3x
} gLv+L]BnhH
aA|{r/.10K
public static void swap(int[] data, int i, int j) { %[p*6&V
int temp = data; `}),wBq
data = data[j]; zVS{X=u
data[j] = temp; g9pKoi|\E
} <\^o
} crIF5^3Yby