[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; K3^2;j1F Q
} LEd@""h
int i1=l; )|,Zp`2/
int i2=mid+1; T@R2H&L
for(int cur=l;cur<=r;cur++){ !j%#7
if(i1==mid+1) W`F?j-4
data[cur]=temp[i2++]; #i 5@G*
else if(i2>r) h4E[\<?
data[cur]=temp[i1++]; a}g<<{
else if(temp[i1] data[cur]=temp[i1++]; 24I\smO
else Utj4f-M
data[cur]=temp[i2++]; O`f[9^fN
} RjxFlKs8
} PTH'-G
, Y^GQ`~#
} lho0Xy gn
Rm[{^V.Z$
改进后的归并排序: 2*@@Bw.XA
VXO.S)v2J
package org.rut.util.algorithm.support; $ucmE
7v V~O@JP
import org.rut.util.algorithm.SortUtil; S0WKEv@Hn
avb'dx*q>
/** ,uL}O]L
* @author treeroot .cK<jF@'
* @since 2006-2-2 "R0(!3
* @version 1.0 1StaQUB
*/ cD'|zH]
public class ImprovedMergeSort implements SortUtil.Sort { 8,L)=3m-
$T7(AohR
private static final int THRESHOLD = 10; mvu$
y4%[^g~-
/* %\B@!4]
* (non-Javadoc) M7.H;.?
* \ZtF,`Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {JtfEna
*/ i:2eJ.
public void sort(int[] data) { 8X#\T/U
int[] temp=new int[data.length]; Q#PkfjXS
mergeSort(data,temp,0,data.length-1); -r%k)4_
} ^=arKp,?5
yk/BQ|G
private void mergeSort(int[] data, int[] temp, int l, int r) { )sLXtV)nm6
int i, j, k; lpnPd{kE
int mid = (l + r) / 2; }K|40oO5
if (l == r) ' 1D1y'
return; 7e=s`j
if ((mid - l) >= THRESHOLD) rLE5fl5W
mergeSort(data, temp, l, mid); 5@^['S4%8*
else _n+ 5{\z
insertSort(data, l, mid - l + 1); $q g/8G
if ((r - mid) > THRESHOLD) %b>Ee>rdD
mergeSort(data, temp, mid + 1, r); IN?rPdY
else -] `OaL!
insertSort(data, mid + 1, r - mid); m`xzvg
>{eGSSG0
for (i = l; i <= mid; i++) { "qhQJql
temp = data; c^7QiTt_
} ]5+<Rqdbg
for (j = 1; j <= r - mid; j++) { R]" jr
temp[r - j + 1] = data[j + mid]; h@+(VQ
} &d=ZCaP
int a = temp[l]; 8B;HMD
int b = temp[r]; k? !'OHmBL
for (i = l, j = r, k = l; k <= r; k++) { (3N;-
if (a < b) { lr9s`>9
data[k] = temp[i++]; >#|%y>g .o
a = temp; PvW~EJ
} else { cm`x;[e6l
data[k] = temp[j--]; =j~Xrytn
b = temp[j]; &6^QFqqW`-
} /^':5"=o
} %Wa. 2s
} '7UIzk|
XX'mM v
/** `J-&Y2_/k
* @param data \s_`ZEB
* @param l G$E+qk nJL
* @param i }5=tUfh)]'
*/ hIFfvUl
private void insertSort(int[] data, int start, int len) { 94xWMX2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]SG(YrF
} 3?s1Yw>?
} HB9|AQ4K
} ~JTp8E9kw
} l [ Navw
/EV _Y|(-
堆排序： Yl"l|2 :
cc:,,T/i
package org.rut.util.algorithm.support; wg=-&-
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import org.rut.util.algorithm.SortUtil; JQH>{OB
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/** et}%E9
* @author treeroot i7foZ\btFc
* @since 2006-2-2 kGW4kuh)/q
* @version 1.0 /yFs$t>9
*/ 66|$X,
public class HeapSort implements SortUtil.Sort{ 6Jd.Eg ~A7
17+2`@vJgM
/* (non-Javadoc) \pVWYx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e#s-MK-Q
*/ ab^>_xD<
public void sort(int[] data) { $m;DwlM
MaxHeap h=new MaxHeap(); b>f{o_
h.init(data); ok(dCAKP
for(int i=0;i h.remove(); qORRpWyx&
System.arraycopy(h.queue,1,data,0,data.length); Mc<O ~
} ObSRd$M
aLO'.5 ~^
private static class MaxHeap{ Gk]6WLi
UOcO\EA+
void init(int[] data){ Qb?eA
this.queue=new int[data.length+1]; st wxF?\NS
for(int i=0;i queue[++size]=data; @<C<rB8R
fixUp(size); #pr{tL
} fm$)?E_Rp
} -gVsOX0
OpFm:j3
private int size=0; rixt_}aE
@h!nVf%fe
private int[] queue; /7hC /!@
'ARbJ1a
public int get() { o>Q=V0?
return queue[1]; OtZc;c
} ;ji["b
r"&VG2c0K
public void remove() { % jSB9
SortUtil.swap(queue,1,size--); UzT"Rb:e
fixDown(1); DgODTxiX
} N~+e\K6
file://fixdown < m/@_"
private void fixDown(int k) { cCO2w2A[*
int j; Jo4iWJpK
while ((j = k << 1) <= size) { \7] SG
if (j < size %26amp;%26amp; queue[j] j++; H1-eMDe
if (queue[k]>queue[j]) file://不用交换 ;P9cjfSn
break; @=dwvl' W
SortUtil.swap(queue,j,k); 89\DS!\x9
k = j; ` *q>E
} ~;yP{F8?
} @3Gr2/a
private void fixUp(int k) { s_%KWkS
while (k > 1) { NM4b]>
int j = k >> 1; +AYB0`X)
if (queue[j]>queue[k]) bz|-x"qk
break; dT'd C
SortUtil.swap(queue,j,k); +\U#:gmw
k = j; Z!2%{HQ=q
} H&!?c5
} =pd#U
ZiaHLpk
} 9qI#vHA
P~M<OUg
} "g:1br?X,9
!U4<4<+
SortUtil： jP}Ix8vc=
#}S<O_
package org.rut.util.algorithm; R?iC"s!
T.pc3+B8N
import org.rut.util.algorithm.support.BubbleSort; THY=8&x)
import org.rut.util.algorithm.support.HeapSort; s5J?,xu
import org.rut.util.algorithm.support.ImprovedMergeSort; GGez!?E%
import org.rut.util.algorithm.support.ImprovedQuickSort; @@d6,=
import org.rut.util.algorithm.support.InsertSort; 4KB>O)YNg'
import org.rut.util.algorithm.support.MergeSort; W[t0hbVw
import org.rut.util.algorithm.support.QuickSort; >b2wFo/em
import org.rut.util.algorithm.support.SelectionSort; S(PU"}vZy
import org.rut.util.algorithm.support.ShellSort; 'w?}~D.y
5F$~ZDu
/** <5o oML]nP
* @author treeroot F}c}I8Ao
* @since 2006-2-2 /q5!p0fH*
* @version 1.0 ;}}k*< Z
*/ GS+Z(,J>=
public class SortUtil { J=6( 4>
public final static int INSERT = 1; "ifv1KZ#
public final static int BUBBLE = 2; C9^C4
public final static int SELECTION = 3; NM+(ss'
public final static int SHELL = 4; >>%E?'9A
public final static int QUICK = 5; 3gs!ojG
public final static int IMPROVED_QUICK = 6; #83pitcc
public final static int MERGE = 7; y&6 pc
public final static int IMPROVED_MERGE = 8; (D2N_l(`<
public final static int HEAP = 9; .O6(QI*
%/w%A:y#&
public static void sort(int[] data) { Ni>!b6Z`[
sort(data, IMPROVED_QUICK); =fK6P6'B
} yR1v3D4E
private static String[] name={ d-`z1'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ::sk)
}; 0SV4p.
#Q@~TW
private static Sort[] impl=new Sort[]{ 7mA:~-.u
new InsertSort(), r<5i
new BubbleSort(), Y|cj&<o
new SelectionSort(), R?HuDxHk
new ShellSort(), uU/'oZ?
new QuickSort(), E7 P'}
new ImprovedQuickSort(), %r]V:d+
new MergeSort(), J*4T|#0
new ImprovedMergeSort(), A,4Z{f83
new HeapSort() -+y3~^EYm,
}; `J%35
AmB*4p5b
public static String toString(int algorithm){ WSbD."p<
return name[algorithm-1]; [oOV@GE
} #Wq@j1?
ZoR6f\2M
public static void sort(int[] data, int algorithm) { { t@7r
impl[algorithm-1].sort(data); 6[Wv g
} Axw+zO
h^'+y1
public static interface Sort { _b9>ZF~
public void sort(int[] data); rA /T>ZM
} Xa$-Sx
yOO@v6jO)
public static void swap(int[] data, int i, int j) { ,"5][RsOn
int temp = data; RMlx[nsq
data = data[j]; LwcAF g|
data[j] = temp; E|y
} 7X<#
} Y'yGhpT~