[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; ~'F.tB
} H3 -?cy
int i1=l; e=3C*+lq\
int i2=mid+1; 9WI5\`*"
for(int cur=l;cur<=r;cur++){ X ]W)D S
if(i1==mid+1) hV:++g
data[cur]=temp[i2++]; ;e.8EL
else if(i2>r) p=3t!3
data[cur]=temp[i1++]; HJBGxyw
else if(temp[i1] data[cur]=temp[i1++]; {Qc,Nl [?
else xojt s;n
data[cur]=temp[i2++]; Mdq|:^px
} Kwi+}B!
} UA4c4~$S
maeQ'Sv_&
} aRElk&M
t2Jf+t_B7
改进后的归并排序: %!eRR
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package org.rut.util.algorithm.support; -}PE(c1%?q
#RbdQH !
import org.rut.util.algorithm.SortUtil; vG7Mk8mIr
1rs.
/** :!hO9ho
* @author treeroot <B>hvuCoH
* @since 2006-2-2 p3Ozfk
* @version 1.0 -<9Qez)y
*/ +~ Hb}0ry
public class ImprovedMergeSort implements SortUtil.Sort { ;u[:J
#!E`%' s]
private static final int THRESHOLD = 10; nCQ".G
`\|tXl.
/* #-PMREgO
* (non-Javadoc) |?ZU8I^vW
* ycSGv4 )
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !#~KSO}zW2
*/ Uk*(C(
public void sort(int[] data) { v_Df+
int[] temp=new int[data.length]; Z=Cw7E
mergeSort(data,temp,0,data.length-1); w>8kBQ?b
} &-{%G=5~e%
kvuRT`/
private void mergeSort(int[] data, int[] temp, int l, int r) { egBk7@Ko
int i, j, k; ,|A6l?iV
int mid = (l + r) / 2; ?@Q0;LG
if (l == r) <T;V9(66
return; *C0a,G4
if ((mid - l) >= THRESHOLD) ID`Ot{ y
mergeSort(data, temp, l, mid); lJN#_V0qW
else dNY'uv&Y
insertSort(data, l, mid - l + 1); Thu_`QP^
if ((r - mid) > THRESHOLD) ~5h4 Gy)
mergeSort(data, temp, mid + 1, r); =+b>d\7xG
else S>r}3,]S
insertSort(data, mid + 1, r - mid); |&xaV-b9W
pUS:HJk|
for (i = l; i <= mid; i++) { 4`mf^Kf
temp = data; SjpCf8Z(
} *aC[Tv[-P
for (j = 1; j <= r - mid; j++) { [s`B0V`04
temp[r - j + 1] = data[j + mid]; QlV(D<
} bCr W'}:de
int a = temp[l]; \At~94
int b = temp[r]; .ahY 1CO
for (i = l, j = r, k = l; k <= r; k++) { $y,KDR7^
if (a < b) { QH4m7M@ni
data[k] = temp[i++]; #pgD-0_
a = temp; .P7q)lj36h
} else { p`rjWpH
data[k] = temp[j--]; U,7
b = temp[j]; jnbR}a=fJ
} >~Gy+-
} ;?@Rq"*
} 8(l0\R,%+z
5'+g[eNyBV
/** }No#_{
* @param data R.2i%cU
* @param l n0gjcDHQ
* @param i -?:8sv*X
*/ 1Az&BZU[
private void insertSort(int[] data, int start, int len) { qTRP2rH,L&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h.]^o*DJ
} SmD#hE[
} \)wVO*9*0
} v;5-1
} jtpHDS
llR5qq=t
堆排序： )m3emMO2
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package org.rut.util.algorithm.support; <*z'sUh+}
A^6z.MdYZ
import org.rut.util.algorithm.SortUtil; wBg?-ji3<
F.x7/;
/** Rf8ZH
* @author treeroot IKnf
* @since 2006-2-2 CQ<d
* @version 1.0 Ye4 &4t
*/ tDah@_
public class HeapSort implements SortUtil.Sort{ 0sKoNzE
[ ^\{>m7
/* (non-Javadoc) T+~&jC:{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H1%o)'Kut4
*/ "Dk@-Ac
public void sort(int[] data) { ^Ss<<
MaxHeap h=new MaxHeap(); PPrvVGP
h.init(data); ewN|">WXQ
for(int i=0;i h.remove(); [.Md_
System.arraycopy(h.queue,1,data,0,data.length); bZgo}`o%
} L\"wz scn
zVtTv-DU
private static class MaxHeap{ Q.7X3A8
z1,#ma}.
void init(int[] data){ m(:R(K(je
this.queue=new int[data.length+1]; S1)g\Lv
for(int i=0;i queue[++size]=data; MIl\Bn
fixUp(size); !BrZTo
} 9}2/ko
} 3AR'Zvn
Gw-{`<CxE
private int size=0; )BI%cD
|0uqW1
private int[] queue; <_pLmYI
@XL49D12c
public int get() { zA$ Y@f
return queue[1]; Y>FLc* h
} :.l\lj0Yf
c[X6!_
public void remove() { G.iQ\'1_h
SortUtil.swap(queue,1,size--); _X<V`, p
fixDown(1); 5>CeFy
} ,K6ODtw.
file://fixdown k5bv57@
private void fixDown(int k) { h82y9($cZ
int j; &WAU[{4W
while ((j = k << 1) <= size) { +/n]9l]#h
if (j < size %26amp;%26amp; queue[j] j++; $^ir3f+
if (queue[k]>queue[j]) file://不用交换 xJ:Am>%\^
break; -:L7iOzgD
SortUtil.swap(queue,j,k); PIFZ '6gn
k = j; R6>*n!*D@
} xDekC~Zq
} Bs`='w%7
private void fixUp(int k) { oz:J.<j24Z
while (k > 1) { d3?gh[$
int j = k >> 1; :mCGY9d4L
if (queue[j]>queue[k]) +|+fDQI
break; 0L"uU3
SortUtil.swap(queue,j,k); _f "I%QTL
k = j; I 6<LKI/
} R*W1<W%q=
} wV$V X
_h=h43'3
} s:,fXg25J
d@cyQFX
} 3)&rj 7
i ^N}avO
SortUtil： Cx(HsJ!,
{O!;cI~
package org.rut.util.algorithm; r[kHVT8
!{uV-c-5,
import org.rut.util.algorithm.support.BubbleSort; C5Fq%y{$.
import org.rut.util.algorithm.support.HeapSort; 1ATH$x
import org.rut.util.algorithm.support.ImprovedMergeSort; DX3jE p2
import org.rut.util.algorithm.support.ImprovedQuickSort; 2%fkXH<
import org.rut.util.algorithm.support.InsertSort; [vY)y\W{
import org.rut.util.algorithm.support.MergeSort; (lYC2i_b#
import org.rut.util.algorithm.support.QuickSort; l`0JL7
import org.rut.util.algorithm.support.SelectionSort; ao2o!-?!t
import org.rut.util.algorithm.support.ShellSort; GLV`IkU %
G8^b9xoA+.
/** r`u9MJ*
* @author treeroot ! c~3`7v
* @since 2006-2-2 Z,XivU&
* @version 1.0 flBJO.2
*/ #^i+'Z=L
public class SortUtil { j}jU.\*v<
public final static int INSERT = 1; +'` ^ N
public final static int BUBBLE = 2; {=R vFA
public final static int SELECTION = 3; OQuTM[W
public final static int SHELL = 4; 'e x/IqbK
public final static int QUICK = 5; T[0CD'|E
public final static int IMPROVED_QUICK = 6; "6?Y$y/wm
public final static int MERGE = 7; rHjR 4q
public final static int IMPROVED_MERGE = 8; )In;nc
public final static int HEAP = 9; .J5or
NH1|_2
public static void sort(int[] data) { n=!5ha%#N
sort(data, IMPROVED_QUICK); )s 1 Ei9J
} c1f`?i}.
private static String[] name={ Hpp;dG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2PSv3?".
}; /h&>tYVio
ZhoB/TgdL
private static Sort[] impl=new Sort[]{ wYHyVY2tj2
new InsertSort(), iqXsDgkr
new BubbleSort(), tjm@+xs
new SelectionSort(), FW<YN;
new ShellSort(), Gh'{O/F4*
new QuickSort(), :J5CmU$
new ImprovedQuickSort(), wLQM]$O
new MergeSort(), (%M:=zm
new ImprovedMergeSort(), `5~<)
new HeapSort() /dVcNo3"
}; D%'rq
#M[Cq= 2
public static String toString(int algorithm){ n6INI~,
return name[algorithm-1]; h&{>4{
} ~BI! l
3e^'mT
public static void sort(int[] data, int algorithm) { rf&nTDaWI
impl[algorithm-1].sort(data); 90$`AMR
} X^0jS
G{|FV m
public static interface Sort { jBd9 $`
public void sort(int[] data); MS%h`Ypo
} 8ax3"G
'DH_ihZ
public static void swap(int[] data, int i, int j) { nZS*"O#L
int temp = data; g[xn0rG
data = data[j]; y {Mh ?H
data[j] = temp; $4TawFf"nc
} 2 BwpxV8
} v|>'m#Ln2