[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; :#D~j]pP
} Kq(JHB+
int i1=l; g8@F/$HY
int i2=mid+1; Lyit`j~yH
for(int cur=l;cur<=r;cur++){ FrE#l.)?!
if(i1==mid+1) !'B='].
data[cur]=temp[i2++]; \u;`Lf
else if(i2>r) 3rR1/\
data[cur]=temp[i1++]; `$q0fTz
else if(temp[i1] data[cur]=temp[i1++]; qqys`.
else 45OAJ?N
data[cur]=temp[i2++]; D0>Pc9
} #$F*.vQSs+
} kdaq_O:s
M`E}1WNQ?]
} 5Vai0Qfcu:
Z;njSw%:
改进后的归并排序: *,~L_)vWO
<(H<*Xf9
package org.rut.util.algorithm.support; 0%)T]SDS
k=&n>P
import org.rut.util.algorithm.SortUtil; }7_$[r'_oI
E()%IC/R
/** ^x_$%8
* @author treeroot M+b?qw
* @since 2006-2-2 OL_jU2,fv
* @version 1.0 fK2r6D9
*/ Av4(=}M}@
public class ImprovedMergeSort implements SortUtil.Sort { ) $0>L5d:
mu5r4W47
private static final int THRESHOLD = 10; HJP~ lg
WdB\n/BWB
/* Ey=}bBx
* (non-Javadoc) >?6HUUQ
* JpxQS~VX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GRaU]Z]ck
*/ dGz4`1(>
public void sort(int[] data) { ]wi0qc2{
int[] temp=new int[data.length]; z7+>G/o
mergeSort(data,temp,0,data.length-1); >0uj\5h)I]
} ` U-vXP
B2|0.G|[j
private void mergeSort(int[] data, int[] temp, int l, int r) { IAmZ_2
int i, j, k; ! h92dH
int mid = (l + r) / 2; v`]y:Ku|wR
if (l == r) dCo3VF"u
return; g/i%XTX>
if ((mid - l) >= THRESHOLD) <]X6%LX
mergeSort(data, temp, l, mid); +S`cUn7
else oZ^,*
insertSort(data, l, mid - l + 1); )[|_q,
if ((r - mid) > THRESHOLD) 6> z{xYat
mergeSort(data, temp, mid + 1, r); !l Egta[Ql
else sFnR;
insertSort(data, mid + 1, r - mid); "z;R"sv\
Z0<s -eN:
for (i = l; i <= mid; i++) { .U44p*I
temp = data; B2'TRXIm1U
} _zi| GD
for (j = 1; j <= r - mid; j++) { GN:|b2 "
temp[r - j + 1] = data[j + mid]; O:GAS [O`
} 1ltW9^cF}
int a = temp[l]; 4>a(!ht
int b = temp[r]; 8S8UV(K0
for (i = l, j = r, k = l; k <= r; k++) { 3,X8 5`v^
if (a < b) { 3HW&\:q5'M
data[k] = temp[i++]; r4DHALu#)
a = temp; Li"+`
} else { E^br-{|{
data[k] = temp[j--]; c))?9H ,e)
b = temp[j]; :FfEjNil
} ".waCt6
} O`"~AY&
} G6}&k[d5%
@rDBK] V
/** VZ=:`)
* @param data pe2:~}WB
* @param l hayJgkZ'
* @param i R=&-nC5e
*/ Lo#G. s|
private void insertSort(int[] data, int start, int len) { _cj=}!I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @ =~k[o
} *78c2`)[
} m-ibS:
} UZrEFpi
} O(!;7v}
#+V4<o
堆排序： sgGA0af
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package org.rut.util.algorithm.support; ;<B
s%`l>#H
import org.rut.util.algorithm.SortUtil; VHMQY*lk
0Xw>_#Y/xS
/** s-+-?$K
* @author treeroot doHE]gC2Uz
* @since 2006-2-2 .%e>>U>F
* @version 1.0 _*%K!%}l=
*/ X[1D$1Dvw
public class HeapSort implements SortUtil.Sort{ -N wic|
OuEcoIK
/* (non-Javadoc) ]@<VLP?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KYJP`va6k
*/ <FBBR2
public void sort(int[] data) { SZ9DT
MaxHeap h=new MaxHeap(); 3Il._]#
h.init(data); 8Q$WwiS
for(int i=0;i h.remove(); vYb4&VV
System.arraycopy(h.queue,1,data,0,data.length); Xq03o#-p+
} nKS*y*
"aCB}
private static class MaxHeap{ #k|f>D4
=E%@8ZbK
void init(int[] data){ adIrrK
this.queue=new int[data.length+1]; 6SH0 y
for(int i=0;i queue[++size]=data; 5QuRwu_
fixUp(size); +y8Y@e}>
} WysWg7,r
} fRLA;1va
=xRD %Z
private int size=0; xH{-UQ3R
'@ Y@Fs
private int[] queue; 9T5 F0?qd
~ZSX84~@u
public int get() { KCw
return queue[1]; jX8)Ov5Mv
} 0m4M@94
OG?7( UJ
public void remove() { +h+ 7Q'k
SortUtil.swap(queue,1,size--); tP*Kt'4W
fixDown(1); M!Ao!D[
} 0#eb] c
file://fixdown OUF%DMl4
private void fixDown(int k) { gj @9(dk%
int j; Ys}^hy
while ((j = k << 1) <= size) { WPNw")t!
if (j < size %26amp;%26amp; queue[j] j++; SJa>!]U'xI
if (queue[k]>queue[j]) file://不用交换 P-gjSE|yh
break; .BBJhXtrdu
SortUtil.swap(queue,j,k); qve'Gm)
k = j; N<a%l J
} K-#d1+P+
} /KF@Un_Ow
private void fixUp(int k) { BlU&=;#r5>
while (k > 1) { e1h7~ j
int j = k >> 1; !Md6Lh%-w
if (queue[j]>queue[k]) J( XDwt
break; g`S;xs
SortUtil.swap(queue,j,k); hx9t{Zi
k = j; Y* rujn{
} JN+7oh]u
} p<L{e~{!7f
MQx1|>rG
} ?2~fvMWu
[1kQ-Ko`
} ;5[OS8
F%o!+%&7
SortUtil： 4jTO:aPh_
y-nv#Ejr
package org.rut.util.algorithm; SF+L-R<e
Q~Mkf&s
import org.rut.util.algorithm.support.BubbleSort; [O&}Qk
import org.rut.util.algorithm.support.HeapSort; 2p](`Y`
import org.rut.util.algorithm.support.ImprovedMergeSort; S%}G 8Ty
import org.rut.util.algorithm.support.ImprovedQuickSort; v"ORn5
import org.rut.util.algorithm.support.InsertSort; T5zS3O
import org.rut.util.algorithm.support.MergeSort; K=JDl-#!
import org.rut.util.algorithm.support.QuickSort; Q;y5E`G
import org.rut.util.algorithm.support.SelectionSort; v/rBjUc+X
import org.rut.util.algorithm.support.ShellSort; aHuMm&
*`u|1}h|
/** P8By~f32_
* @author treeroot ;xz_H$g
* @since 2006-2-2 P}5bSQ( a3
* @version 1.0 1mJUlx
*/ JZ-@za6u
public class SortUtil { ^-q{:lx
public final static int INSERT = 1; c:0n/DC
public final static int BUBBLE = 2; (i%bQZt^?
public final static int SELECTION = 3; Xzg >/w 8J
public final static int SHELL = 4; vkhPE(f
public final static int QUICK = 5; PaQ lQ#
public final static int IMPROVED_QUICK = 6; grgs r_)[
public final static int MERGE = 7; _d3Z~cH
public final static int IMPROVED_MERGE = 8; 6}N`YOJ.
public final static int HEAP = 9; L5`k3ap|
\&kj#)JYA
public static void sort(int[] data) { M KW~rrR
sort(data, IMPROVED_QUICK); WFahb3kx
} yXDjM2oR/2
private static String[] name={ *|W](id7e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wMR,r@}
}; <dP\vLH_
ef '?O
private static Sort[] impl=new Sort[]{ =l/Dc=[
new InsertSort(), &gr 8;O:0
new BubbleSort(), Ot-P J i
new SelectionSort(), o[_,r]%+D
new ShellSort(), J?m/u6
new QuickSort(), KMy"DVqE
new ImprovedQuickSort(), ynM~&]fk#k
new MergeSort(), &t<gK D
new ImprovedMergeSort(), ^uUA41o`eJ
new HeapSort() }W:Z>vam+
}; 8,IF%Z+LI
e16H@
public static String toString(int algorithm){ t{iRCj
return name[algorithm-1]; k-n`R)p:
} e`={_R{N
K% FK
public static void sort(int[] data, int algorithm) { &t8,326;
impl[algorithm-1].sort(data); < r~hU*u
} CUH u=
`K+%/|!
public static interface Sort { su=MMr>
public void sort(int[] data); [06m{QJ)1
} lmHQ"z 3G
iy]L"7&Z2
public static void swap(int[] data, int i, int j) { S`5bcxI_
int temp = data; P=,\wM6T|
data = data[j]; fK=0?]s}I
data[j] = temp; RRS)7fFm
} D`^wj FF
} M&/4SVBF