[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; dqL)q3
} i;<H^\%
int i1=l; yzCamm4~0
int i2=mid+1; o 3 G*
for(int cur=l;cur<=r;cur++){ ;#2yF34gv
if(i1==mid+1) ma2-66M~j
data[cur]=temp[i2++]; K30{Fcb< h
else if(i2>r) cr{f*U6`
data[cur]=temp[i1++]; fH 5/
else if(temp[i1] data[cur]=temp[i1++]; s4\_%je<v
else "Kn%|\YL@4
data[cur]=temp[i2++]; [1`&\C_E
} H|!|fo-Tx
} pL'+sW
OEgp!J
} &q[`lIV,L
)mXu{uowr
改进后的归并排序: 2G`tS=Un
g"v-hTx
package org.rut.util.algorithm.support; 3hzKd_
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import org.rut.util.algorithm.SortUtil; 6SD9lgF*-
&Sp2['a!
/** Oc?]L&ap
* @author treeroot M,9f}V)
* @since 2006-2-2 TzY[-YlvF
* @version 1.0 "PY&NL?
*/ ^{fA:N=
public class ImprovedMergeSort implements SortUtil.Sort { e/!xyd
d#3E'8
private static final int THRESHOLD = 10; w'D=K_h
dX~$#-Ad86
/* p#(5 ;
* (non-Javadoc) nJo6;_MI!
* Ut^ {4_EC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _QOZ`st
*/ t2q{;d~.
public void sort(int[] data) { nx'D&,VX
int[] temp=new int[data.length]; -]~vEfq+T
mergeSort(data,temp,0,data.length-1); f+W%X
} =ET|h}I
5"9!kZ(<
private void mergeSort(int[] data, int[] temp, int l, int r) { [E|%
int i, j, k; rjW\tuZI
int mid = (l + r) / 2; /jv4#9
if (l == r) t5WW3$Nf
return; A^"( VaK
if ((mid - l) >= THRESHOLD) -|A`+1-R+
mergeSort(data, temp, l, mid); q*4=sf,>
else 1$ C\`
insertSort(data, l, mid - l + 1); \B~}s}
if ((r - mid) > THRESHOLD) ?T <2Cl'C
mergeSort(data, temp, mid + 1, r); u IGeSd5B
else dBMr%6tz
insertSort(data, mid + 1, r - mid); r5g:#mF"
#Rcb iV*M
for (i = l; i <= mid; i++) { Ves x$!F#
temp = data; 5ki<1{aVtZ
} KI{B<S3*Z
for (j = 1; j <= r - mid; j++) { h#rziZ(
temp[r - j + 1] = data[j + mid]; +&h<:/ V
} vCS D1~V_
int a = temp[l]; P<A_7Ho
int b = temp[r]; 2^$Ha|
for (i = l, j = r, k = l; k <= r; k++) { -9z!fCu3
if (a < b) { 'l*p!=
data[k] = temp[i++]; S 7 *LV;
a = temp; s xp>9&
} else { '9d] B^)F
data[k] = temp[j--]; 8C>\!lW"
b = temp[j]; fC$(l@O?
} ijR,%qg
} aaODj>
} V1Opp8
0B?t:XU,
/** TmIw?#q^
* @param data :N ~A7@
* @param l L1J~D?q
* @param i $,9A?'
*/ ny{Yr>:2
private void insertSort(int[] data, int start, int len) { h#7p&F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Doj>Irj?7
} K/Qo~
} 9d_ Zdc
} ~y.t amNW
} >Kjl>bq
#.^A5`k
堆排序： zLda&#+
+=N#6#1
package org.rut.util.algorithm.support; "MNI_C#{
sV`!4 u7%}
import org.rut.util.algorithm.SortUtil; S)$iHBx{
E\Et,l#|LY
/** oi:!YVc
* @author treeroot 6wY6*R
* @since 2006-2-2 )eaEc9o>
* @version 1.0 yhSbX4Q
*/ 2jiH&'@
public class HeapSort implements SortUtil.Sort{ \hr2#!
wYAi-gdOi
/* (non-Javadoc) \x9.[?;=e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BL^\"Xh$|
*/ |qFCzK9tD/
public void sort(int[] data) { LW '3m5
MaxHeap h=new MaxHeap(); 1ms(03dp
h.init(data); oW \k%Vj
for(int i=0;i h.remove(); &K.js
System.arraycopy(h.queue,1,data,0,data.length); yrVk$k#6}
} vQ",rP%
7U,[Ruu
private static class MaxHeap{ A5[iFT>
M\rZr3
void init(int[] data){ kt;uB X3
this.queue=new int[data.length+1]; ]5Mq^@mD'
for(int i=0;i queue[++size]=data; F2:nL`]b[
fixUp(size); g<(\#F}/
} JRYCM}C]
} FZ~^cK9g:
*H({q`j33k
private int size=0; <*F!A' w2o
v%$c_'d
private int[] queue; Q^!x8oUF
[;RO=
public int get() { {GP#/5$=
return queue[1]; Qf#=Y j
} WAqH*LB
0Mu6R=s
public void remove() { ,\Uc/wR
SortUtil.swap(queue,1,size--); ziTE*rNJ
fixDown(1); sRkPXzK
} x=%wPVJ
file://fixdown tEFbL~n
private void fixDown(int k) { > t~2
int j; L }L"BY3$
while ((j = k << 1) <= size) { J,Rp&tavt:
if (j < size %26amp;%26amp; queue[j] j++; O ! iN
if (queue[k]>queue[j]) file://不用交换 &A!?:?3%O
break; xjK@Q1MJ
SortUtil.swap(queue,j,k); +ko-oZ7V
k = j; eWWtMnq
} *P0sl( &
} AREpZ2GiU
private void fixUp(int k) { e[l#r>NT
while (k > 1) { (R|Ftjs .
int j = k >> 1; MlH0
if (queue[j]>queue[k]) 6O0CF}B*
break; VteMsL/H
SortUtil.swap(queue,j,k); YM.Q?p4g
k = j; :-)H tyzf
} 'M!*Ge
} ;@$v_i
;&i4QAo-
} '"M9`@Y3^
_A]=45cn~
} F*TkQ\y
k!)Pl,nJ
SortUtil： 'D&[Y)f^
9[,+4&wX7
package org.rut.util.algorithm; |$+ xVi8
1}ER+;If
import org.rut.util.algorithm.support.BubbleSort; X(M|T]`b:
import org.rut.util.algorithm.support.HeapSort; G{]tB w
import org.rut.util.algorithm.support.ImprovedMergeSort; >1S39n5z.
import org.rut.util.algorithm.support.ImprovedQuickSort; U]}f]GK
import org.rut.util.algorithm.support.InsertSort; we}G%09L
import org.rut.util.algorithm.support.MergeSort; NSkIzaNY
import org.rut.util.algorithm.support.QuickSort; uG,*m'x']
import org.rut.util.algorithm.support.SelectionSort; |kK_B :K
import org.rut.util.algorithm.support.ShellSort; _?rL7oTv
nv'YtmR
/** q)Qg'l^f
* @author treeroot B`mTp01
* @since 2006-2-2 8'|_O
* @version 1.0 q>f|1Pf
*/ ZZ2vdy38
public class SortUtil { JS2h/Y$
public final static int INSERT = 1; Zt/4|&w
public final static int BUBBLE = 2; m4x8W2q
public final static int SELECTION = 3; 7v]9) W=y
public final static int SHELL = 4; 8d1r#sILI
public final static int QUICK = 5; , G9{:
public final static int IMPROVED_QUICK = 6; >eM>Y@8=
public final static int MERGE = 7; A3eus
public final static int IMPROVED_MERGE = 8; b`& :`
public final static int HEAP = 9; RcpKv;=iB
6BH P#B2j
public static void sort(int[] data) { @5tGI U;1
sort(data, IMPROVED_QUICK); P={8qln,X
} /ei(Q'pc[
private static String[] name={ 6xiCTs0@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O 4C}]E
}; n@_aTY
[oDu3Qn
private static Sort[] impl=new Sort[]{ /7LAd_P6
new InsertSort(), +[Bl@RHe^
new BubbleSort(), $iMbtA5aQ
new SelectionSort(), 8Os: SC@Q
new ShellSort(), Aq;WQyZ2
new QuickSort(), 'y%*W:O
new ImprovedQuickSort(), jeWI<ms
new MergeSort(), 5fY7[{2
new ImprovedMergeSort(), SL5QhP
new HeapSort() fjh,e
}; 4zhg#
cH6<'W{*
public static String toString(int algorithm){ +<rWYF(ii/
return name[algorithm-1]; 'dJ(x
} 1+v!)Y>Z&
H$rNT/C
public static void sort(int[] data, int algorithm) { lN~u='Kc
impl[algorithm-1].sort(data); z$Z{ LR
} \'.|7{Xu
s6(bTO.
public static interface Sort { `G "&IQ8.
public void sort(int[] data); 7u<C&Z/
} ;!pSYcT,
T7LO}(I.&
public static void swap(int[] data, int i, int j) { {66P-4Ev(
int temp = data; =`E{QCW
data = data[j]; Ft<B[bQ
data[j] = temp; ycj\5+g
} Rj!9pwvT
} 75W@B}dZd