[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; M{SJ8+G
} ]dgi]R|`
int i1=l; ~y"OyOi&
int i2=mid+1; 'S*]JZ1
for(int cur=l;cur<=r;cur++){ Yv0y8Vz@
if(i1==mid+1) ?Ezy0>j
data[cur]=temp[i2++]; x,|fblQz
else if(i2>r) Rtlc&Q.b
data[cur]=temp[i1++]; VP<LY/'f
else if(temp[i1] data[cur]=temp[i1++]; QL*RzFAD3
else (G(M"S SC
data[cur]=temp[i2++]; >XX93
} `I(ap{
} {ft |*
| GN/{KH]
} 'p@m`)Z
)0g!lCfb
改进后的归并排序: `gyke2n
/F6"uZSt4
package org.rut.util.algorithm.support; 5K-,k^T}
*Uy;P>8
import org.rut.util.algorithm.SortUtil; WD! " $
RxNLn/?d@
/** yYSoJqj Q
* @author treeroot DQ9aq.;
* @since 2006-2-2 ?cn`N|
* @version 1.0 o-JB,^TE
*/ J'tJY% `
public class ImprovedMergeSort implements SortUtil.Sort { H)CoByaj
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private static final int THRESHOLD = 10; hT`&Xb
b"nkF\P@Fj
/* J _q
* (non-Javadoc) p<?lF
* a*iKpr-:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @!}/$[hu1
*/ A.h0H]*Ma
public void sort(int[] data) { \v$zU
int[] temp=new int[data.length]; p.b#RY
mergeSort(data,temp,0,data.length-1); 2 /*z5
} H!Dj.]T
$s-B
private void mergeSort(int[] data, int[] temp, int l, int r) { v`G}sgn
int i, j, k; lCBH3-0^
int mid = (l + r) / 2; *{5/" H5
if (l == r) )u4=k(
return; 2%9L'-
if ((mid - l) >= THRESHOLD) U"oHPK3"TA
mergeSort(data, temp, l, mid); )rlkQ'DN
else QpRk5NeLe
insertSort(data, l, mid - l + 1); H9(UzyN>i
if ((r - mid) > THRESHOLD) W39J)~D^@
mergeSort(data, temp, mid + 1, r); 6q!Q([D_
else R%q:].
insertSort(data, mid + 1, r - mid); salDGsW^
jbUg?4k!
for (i = l; i <= mid; i++) { (bpRX$is
temp = data; ;C=V-r
} m)?0;9bt
for (j = 1; j <= r - mid; j++) { X*w;6 V
temp[r - j + 1] = data[j + mid]; XBB>"
} 3Bvz& `\
int a = temp[l]; K9yZG
int b = temp[r]; J<4_<.o(a
for (i = l, j = r, k = l; k <= r; k++) { wXZ9@(^
if (a < b) { W~a|AU8]C
data[k] = temp[i++]; WFhppi
a = temp; 9W_mSum
} else { qnnRS
data[k] = temp[j--]; 94|ZY}8|f
b = temp[j]; W]_a_5
} HKJ^6|'
} l*huKSX}
} <:T/hm$
[>\e@ =
/** adRIg:2
* @param data c5:0`~5Fn
* @param l 5rc3jIXc{|
* @param i I+SfZ:q^
*/ <#199`R
private void insertSort(int[] data, int start, int len) { /q,=!&f2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H8B2{]HAt
} ;uv$>Fauk
} >n(dyU@
} Sa0IRC<LV
} TTbJ9O<43
s&Al4>}.f
堆排序： p#-=mXE/2
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package org.rut.util.algorithm.support; >j*0fb!:]
s{{8!Q
import org.rut.util.algorithm.SortUtil; DiY74D
CfD4m,6
/** 5w{U/v$Z
* @author treeroot dm40qj
* @since 2006-2-2 TU6YS<
* @version 1.0 aY;34SF
*/ "gzn%k[D9m
public class HeapSort implements SortUtil.Sort{ vu}U2 0@
Uovna:"
/* (non-Javadoc) 3Zs0W{OxU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X+<9-]=
*/ 9`5.0**
public void sort(int[] data) { Ktvs*.?
MaxHeap h=new MaxHeap(); Pn4jI(
h.init(data); Z_<NUPE
for(int i=0;i h.remove(); +2}Ar<elP
System.arraycopy(h.queue,1,data,0,data.length); R>1oF]w
} |9Yx`_DF
l-!"
private static class MaxHeap{ KK]R@{ r
-nX{&Z3-s
void init(int[] data){ Pth4_]US
this.queue=new int[data.length+1]; x1STjI>i
for(int i=0;i queue[++size]=data; p_e x
fixUp(size); VS>hi~j
} o1b.a*SZ
} J7e/+W~
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private int size=0; ~m0=YAlk?
.y_~mr&d
private int[] queue; )"|wWu
CdcBE.%<
public int get() { p]?eIovi
return queue[1]; zf5%|7o
} ZCb@!V}=
<{hB&4oL
public void remove() { 20}]b*C}
SortUtil.swap(queue,1,size--); =knLkbiq7,
fixDown(1); YcR: _ac
} nw_|W)JVQ
file://fixdown B}*\ pdJ
private void fixDown(int k) { _ Qek|>
int j; ,I+O;B:0
while ((j = k << 1) <= size) { kK 5~hpv
if (j < size %26amp;%26amp; queue[j] j++; UfV {m
if (queue[k]>queue[j]) file://不用交换 QwF.c28[
break; p]Qe5@NT
SortUtil.swap(queue,j,k); a9_2b}t
k = j; e8egxm
} bNtOqhi
} PJe\PGh
private void fixUp(int k) { m7XN6zX
while (k > 1) { R$MR|
int j = k >> 1; &hi][Pt
if (queue[j]>queue[k]) IM[=]j.?
break; wN6sica|
SortUtil.swap(queue,j,k); W~i0.rg|>
k = j; eecIF0hp
} ;ByCtVm2
} aO9\8\^
N[O_}_
} 9o6qN1A0g
rXip"uz(K>
} S"87 <o
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SortUtil： d4Y[}Fcp+
IF//bgk-
package org.rut.util.algorithm; -GQ.B{%G
T2mZkK?rA
import org.rut.util.algorithm.support.BubbleSort; V/R@=[
import org.rut.util.algorithm.support.HeapSort; L;b-=mF
import org.rut.util.algorithm.support.ImprovedMergeSort; (5[#?_~
import org.rut.util.algorithm.support.ImprovedQuickSort; 36.mf_AM
import org.rut.util.algorithm.support.InsertSort; F^TOLwix
import org.rut.util.algorithm.support.MergeSort; G4#Yz6O
import org.rut.util.algorithm.support.QuickSort; /^&$ma\
import org.rut.util.algorithm.support.SelectionSort; /jq"r-S"
import org.rut.util.algorithm.support.ShellSort; irjHPuhcG
P/]8+_K
/** BCd0X. m(
* @author treeroot V2tA!II-s
* @since 2006-2-2 p!?7;
* @version 1.0 oW(8bd)
*/ [`KQ\4u
public class SortUtil { tEibxE
public final static int INSERT = 1; \S~<C[P
public final static int BUBBLE = 2; n iB<h
public final static int SELECTION = 3; b Hy<`p0
public final static int SHELL = 4; f)Z'#[A*t7
public final static int QUICK = 5; X\<a|/{V A
public final static int IMPROVED_QUICK = 6; Y!|};
public final static int MERGE = 7; (.{."
public final static int IMPROVED_MERGE = 8; m5KLi &R
public final static int HEAP = 9; QEx&AT
=Q|s[F
public static void sort(int[] data) { \(5Bi3PA}
sort(data, IMPROVED_QUICK); AJRiwP|H+
} }2Im?Q
private static String[] name={ ~IQjQz?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k<"N^+GSz
}; =aehhs>
O&">%aU1I
private static Sort[] impl=new Sort[]{ '64/2x
new InsertSort(), jd 8g0^
new BubbleSort(), &N%-.&t'
new SelectionSort(), 2fPMZ7Zd3
new ShellSort(), d{C8}U
new QuickSort(), {>brue*)
new ImprovedQuickSort(), dQ<e}wtg
new MergeSort(), x}reeqn
new ImprovedMergeSort(), Ja@?.gW
new HeapSort() z:{R4#(Q
}; Z@Qf0 c
x_H"<-By
public static String toString(int algorithm){ [Kbna>`
return name[algorithm-1]; O9p^P%U"
} 0upZ4eN
,-Lv3
public static void sort(int[] data, int algorithm) { \}Pr!tk!
impl[algorithm-1].sort(data); )9!ZkZbv_m
} a$6pA@7}
E 6!V0D
public static interface Sort { F#efs6{
public void sort(int[] data); !}xRwkN
} uQWd`7
^^)\|kW?
public static void swap(int[] data, int i, int j) { gti=GmL(L
int temp = data; $g#d1u0q
data = data[j]; ZPY84)A_}
data[j] = temp; qZSW5lC0
} $,Y?qn/
} 81wmKqDEs