[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; w D}g\{P
} 8!XK[zL
int i1=l; 5jey%)=
int i2=mid+1; s(0"r.
for(int cur=l;cur<=r;cur++){ ~Gj%z+<
if(i1==mid+1) !;, Dlq-}
data[cur]=temp[i2++]; V48o+O
else if(i2>r) PRi1 `%d
data[cur]=temp[i1++]; Dt~ |)L+
else if(temp[i1] data[cur]=temp[i1++]; /%{Qf
else "8l&m6`U-
data[cur]=temp[i2++]; b?]Lx.l-
} /H'F4->
} [bh8Nj\E
/^\UB fE
} U9t-(`[j?
I&JjyR
改进后的归并排序: 2tqj]i
CzfGb4
package org.rut.util.algorithm.support; |r<#>~*
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import org.rut.util.algorithm.SortUtil; ?,z/+/:
_O;2.M%@
/** hdN[wC]
* @author treeroot p*C|kEqk
* @since 2006-2-2 ;7*R;/
* @version 1.0 G?dxLRy.do
*/ nXJG4$G
public class ImprovedMergeSort implements SortUtil.Sort { We)l_>G
a+=.(g
private static final int THRESHOLD = 10; DFM~jlH
(N^tg8Z<
/* 6d{&1-@>
* (non-Javadoc) (iJ9ekB
* 3aUWQP2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J.Fy0W@+k4
*/ [4 y7tjar^
public void sort(int[] data) { $2/v8
int[] temp=new int[data.length]; ,LodP%%UV
mergeSort(data,temp,0,data.length-1); U9(p ^
} ! _p(H
k];NTALOG
private void mergeSort(int[] data, int[] temp, int l, int r) { rHpxk
int i, j, k; Kd!.sB/%
int mid = (l + r) / 2; yOswqhz
if (l == r) fWs@ZCt
return; 'Da*MGu9
if ((mid - l) >= THRESHOLD) w#^z:7fI
mergeSort(data, temp, l, mid); 6DT^:LHS
else DkJ "#8Yl=
insertSort(data, l, mid - l + 1); 9D[Jn}E:
if ((r - mid) > THRESHOLD) /8Ru O
mergeSort(data, temp, mid + 1, r); 0BrAgv"3a_
else $_f"NE}
insertSort(data, mid + 1, r - mid); 3%L@=q
><wYk)0E
for (i = l; i <= mid; i++) { O6"S=o&
temp = data; ?aWMU?S
} GV0-"9uwX~
for (j = 1; j <= r - mid; j++) { DIBoIWSuR
temp[r - j + 1] = data[j + mid]; T)o>U&KNP
} ]114\JE
int a = temp[l]; !g7lJ\B
int b = temp[r]; 1LVO0lT
for (i = l, j = r, k = l; k <= r; k++) { wAKm]?zB>
if (a < b) { Bdr'd? u<A
data[k] = temp[i++]; &w%--!T
a = temp; 5>\~jf
} else { i_f\dkol
data[k] = temp[j--]; !hjA
b = temp[j]; Ox%p"xuP,
} (sqI:a
} e#odr{2#4u
} wV^c@.ga
?np3*;lw
/** 0vZ49}mb)
* @param data v2jpao<K
* @param l 2(AuhZ>
* @param i XiO~^=J
*/ .R]DT5
private void insertSort(int[] data, int start, int len) { gP.PyYUV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yfr4<;%
} b_Dd$NC
} /Ref54
} N|e#&
} ?/q\S
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堆排序： jSMxba]
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package org.rut.util.algorithm.support; 2 9#jKh
N?2C*|%f
import org.rut.util.algorithm.SortUtil; u';9zk/$
nArG I}@
/** s("\]K
* @author treeroot ipC <p?PpR
* @since 2006-2-2 vYg>^!Q
* @version 1.0 (vFO'jtcB-
*/ Y/ I32@
public class HeapSort implements SortUtil.Sort{ k}0b7er=R
"1Y'VpKm(~
/* (non-Javadoc) yT-qT_.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gy Ey=@L
*/ %JL P=(
public void sort(int[] data) { hsHbT^Qm
MaxHeap h=new MaxHeap(); 8Dkq+H93
h.init(data); ,lcSJ^yr
for(int i=0;i h.remove(); Y?ZzFd,i&
System.arraycopy(h.queue,1,data,0,data.length); h+ <Jv
} ckYT69U
0.[tEnLZ
private static class MaxHeap{ qLV3Y?S!L
VWK%6Ye0
void init(int[] data){ $wC'qV *
this.queue=new int[data.length+1]; FfNUFx2N
for(int i=0;i queue[++size]=data; &%`WXe-`R
fixUp(size); X?U'GLm
} yA#nnu1
} :-Ml?:0_X
[@_W-rA
private int size=0; .(99f#2M:
Wv||9[Rd
private int[] queue; &2bqL!k
"7Z-ACyF5
public int get() { *x:*Q \|
return queue[1]; ?I$-im
} c2gi3
<HnpI
public void remove() { JwQ/A[b
SortUtil.swap(queue,1,size--); =~>g--^U
fixDown(1); WbwwI)1
} wC?$P
file://fixdown /gn!="J
private void fixDown(int k) { @b!W8c6
int j; ey6ujV7!
while ((j = k << 1) <= size) { Zs4NN2~
if (j < size %26amp;%26amp; queue[j] j++; ?a-5^{{
if (queue[k]>queue[j]) file://不用交换 k [LV^oEg
break; [HI$[:[
SortUtil.swap(queue,j,k); U!(es0rX
k = j; _2Mpzv
} U C_$5~8p
} GvZ[3GT
private void fixUp(int k) { {isL<
while (k > 1) { 2u$rloc$b
int j = k >> 1; L2=:Nac
if (queue[j]>queue[k]) h5(OjlMC
break; Y]tbwOle
SortUtil.swap(queue,j,k); ]T6pH7~
k = j; v[r8-0c
} 3l"8_zLP
} ;W]9DBAB
3W%j^nM
} s(KSN/
bz}-[W+
} v-BQ>-&s
%>$Puy\U
SortUtil： 74 &q2g{
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package org.rut.util.algorithm; [8~P Pc^
fm L8n<1
import org.rut.util.algorithm.support.BubbleSort; }|%1LL^pB
import org.rut.util.algorithm.support.HeapSort; hI9q);g
import org.rut.util.algorithm.support.ImprovedMergeSort; <PiO %w{
import org.rut.util.algorithm.support.ImprovedQuickSort; ^qzH(~g{M
import org.rut.util.algorithm.support.InsertSort; Qj'Ik`o
import org.rut.util.algorithm.support.MergeSort; P)cEYk
import org.rut.util.algorithm.support.QuickSort; !6x7^E;c
import org.rut.util.algorithm.support.SelectionSort; CW2)1%1iz
import org.rut.util.algorithm.support.ShellSort; =t`cHs29
}*C*!?pcd
/** 3I(;c ,S
* @author treeroot K:^0*5Y-k
* @since 2006-2-2 `2hg?(ul
* @version 1.0 w {"1V7|
*/ jwUX?`6jX
public class SortUtil { I _gE`N
public final static int INSERT = 1; R1*4
public final static int BUBBLE = 2; B%tWi
public final static int SELECTION = 3; 6']HmM
public final static int SHELL = 4; )XHn.>]nc
public final static int QUICK = 5; U E$Ix
public final static int IMPROVED_QUICK = 6; XMiu}w!
public final static int MERGE = 7; lB0`|UEb (
public final static int IMPROVED_MERGE = 8; 0)M8Tm0$
public final static int HEAP = 9; R8_I ASs
'y=N_/+s
public static void sort(int[] data) { GGf<9!:
sort(data, IMPROVED_QUICK); Le:(;:eL>t
} [h8s0
private static String[] name={ %~y>9K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sg4{IU
}; |-)8=QDz)r
#=VYq4B=
private static Sort[] impl=new Sort[]{ Nke!!A}\|
new InsertSort(), V$sY3,J7A%
new BubbleSort(), ZPyzx\6\
new SelectionSort(), r fzNw
new ShellSort(), Zazff@O *
new QuickSort(), ^5.XQ0n
new ImprovedQuickSort(), dI&Q5M8
new MergeSort(), TL)*onA9
new ImprovedMergeSort(), 5mC"8N1)
new HeapSort() DzQ
}; </WeB3#6
xDGS`o_w_
public static String toString(int algorithm){ Fs].Fa
return name[algorithm-1]; TN1pg
} N0.|Mb"?t
E5$]0#jB
public static void sort(int[] data, int algorithm) { ?3p7MjvZ
impl[algorithm-1].sort(data); ;AE-=/<
} 4(|yl^w
nYFrp)DLK
public static interface Sort { wD=]U@t`,
public void sort(int[] data); YZj*F-}
} NC#F:M;b
s2#Ia>5!
public static void swap(int[] data, int i, int j) { i'7+ ?YL
int temp = data; u '7h(1@
data = data[j]; IHYLM;@L
data[j] = temp; dH!z<~
} An$2='=/
} xC,x_:R`