[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; xKY$L*
} cvKV95bn
int i1=l; 1s Br.+p
int i2=mid+1; D+f'*|
for(int cur=l;cur<=r;cur++){ o:_^gJ+|
if(i1==mid+1) sT)6nV
data[cur]=temp[i2++]; ,VAp>x+O
else if(i2>r) N*~_\x
data[cur]=temp[i1++]; Q(lku"U'
else if(temp[i1] data[cur]=temp[i1++]; BR;QY1
else %moJF1
data[cur]=temp[i2++]; pJd0k"{
} \;-qdV_JB
} ;SfNKu
0eFb?Z0]
} GP* +
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改进后的归并排序: 9u?(^(.
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package org.rut.util.algorithm.support; ,!`SY)
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import org.rut.util.algorithm.SortUtil; 9ftN8Svw
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/** mV<i JZh
* @author treeroot 8)sg_JC
* @since 2006-2-2 2A*/C7
* @version 1.0 G-arnu)
*/ (B&h;U$HAH
public class ImprovedMergeSort implements SortUtil.Sort { nB=0T`vQ
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private static final int THRESHOLD = 10; ~uB'3`x
DR6]-j!FK
/* qh-[L
* (non-Javadoc) aM), M]m[
* i`+B4I8[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tevQW
*/ GJX4KA8J
public void sort(int[] data) { Y&s2C%jT
int[] temp=new int[data.length]; `|]e6Pb
mergeSort(data,temp,0,data.length-1); }'lNi^"XL
} Q!K`e)R
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private void mergeSort(int[] data, int[] temp, int l, int r) { sMH#BCC
int i, j, k; :lK4 db
int mid = (l + r) / 2; p'&*r2_ram
if (l == r) ob'n{T+lZ
return; *xcP`
if ((mid - l) >= THRESHOLD) k^^:;OR
mergeSort(data, temp, l, mid); 3%^z?_
else GQx9u^>
insertSort(data, l, mid - l + 1); a\pi(9R
if ((r - mid) > THRESHOLD) |6%.VY2b
mergeSort(data, temp, mid + 1, r); "x&3Z@q7
else Tw//!rpG
insertSort(data, mid + 1, r - mid); L~dC(J)@ZI
YdI0E
for (i = l; i <= mid; i++) { vBNZ<L\|a
temp = data; }~Q5Y3]#~
} 5[4Z=RP
for (j = 1; j <= r - mid; j++) { XrS\+y3
temp[r - j + 1] = data[j + mid]; L,~MicgV
} Fd7*]a
int a = temp[l]; '&by3y5w-3
int b = temp[r]; H0a-(
for (i = l, j = r, k = l; k <= r; k++) { =Y9\DeIZ
if (a < b) { pcH<gF(k
data[k] = temp[i++]; <*u C
a = temp; bD<qNqX$
} else { }E;F)=E
data[k] = temp[j--]; S5_t1wqBJ
b = temp[j]; wVqd$nsY"
} : ,p||_G&
} C c*({
} JRO$<
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/** &aPl`"j
* @param data %jEY3q
* @param l <tbZj=*O/o
* @param i i"HgvBHx
*/ 9cd8=][
private void insertSort(int[] data, int start, int len) { K)S;:MLG=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z856 nl
} >|3a 9S
} 0@)%h&mD
} frN3S
} Km3&N
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堆排序： zoP%u,XL
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package org.rut.util.algorithm.support; F Z!J
Y-p<qL|_
import org.rut.util.algorithm.SortUtil; \k@Z7+&7
dB;3.<S=
/** "&lN\&:
* @author treeroot Z0ReWrl;`
* @since 2006-2-2 )ofm_R'q*
* @version 1.0 #tjmWGo,
*/ t`G)b&3_O
public class HeapSort implements SortUtil.Sort{ :eOR-}p'
nrpI5t.b
/* (non-Javadoc) M3pjXc<O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f vLC_'M
*/ +a|/l
public void sort(int[] data) { }Qrab#v
MaxHeap h=new MaxHeap(); '#Dg8/r!
h.init(data); {J]-<:XD
for(int i=0;i h.remove(); YQgNv`l}
System.arraycopy(h.queue,1,data,0,data.length); Pxhz@":[
} z^W$%G
}+RB=#~o
private static class MaxHeap{ 6)e5zKW!?
?znSx}t
void init(int[] data){ `cr(wdvI
this.queue=new int[data.length+1]; [pgZbOIN37
for(int i=0;i queue[++size]=data; ]hE="z=n
fixUp(size); @Bs0Avj.
} 4h|dHXYZ
} _+w/ pS`M
%f&< wC
private int size=0; .Q&rfH3
I,O#X)O|i
private int[] queue; /#S>sOg2xq
PlCc8Zy
public int get() { ~`eHHgX
return queue[1]; :b/jNHJU
} ~xyw>m+o.
v6uxxsI>Hm
public void remove() { ;(6P6@+o
SortUtil.swap(queue,1,size--); *P2[qhP2
fixDown(1); |n6Eg9
} *'R#4@wmP
file://fixdown A0xC,V~z
private void fixDown(int k) { ~kKrDLW+
int j; J]pa4C`
while ((j = k << 1) <= size) { SKXD^OH
if (j < size %26amp;%26amp; queue[j] j++; o-eKAkh
if (queue[k]>queue[j]) file://不用交换 ^_>!B)
break; Q\kub_I{@
SortUtil.swap(queue,j,k); Sm|(
k = j; m)&znLA
} SEF6B45}1
} \#dl6:"
private void fixUp(int k) { Q M1F?F
while (k > 1) { +S~.c;EK
int j = k >> 1; {G*QY%j^
if (queue[j]>queue[k]) GsV4ZZ
break; u oVNK
SortUtil.swap(queue,j,k); Qv#]81i(1
k = j; eN-au/kN
} BC/_:n8O
} 3Wx,oq;4-
tRfm+hqRZ
} 1BTIJ Gw
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} 7#2j>G{?]v
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SortUtil： KMjg;!y
RKTb'3H
package org.rut.util.algorithm; B0)]s<<
0 bSA_
import org.rut.util.algorithm.support.BubbleSort; F^kwdS
import org.rut.util.algorithm.support.HeapSort; =-jD~rN4;P
import org.rut.util.algorithm.support.ImprovedMergeSort; N$alUx*
import org.rut.util.algorithm.support.ImprovedQuickSort; O/OiQ^T
import org.rut.util.algorithm.support.InsertSort; py<_HyJ
import org.rut.util.algorithm.support.MergeSort; \2X$C#8E
import org.rut.util.algorithm.support.QuickSort; F 3RB
import org.rut.util.algorithm.support.SelectionSort; F0dI/+
import org.rut.util.algorithm.support.ShellSort; 3$p#;a:=n
Utt>H@t[
/** E{Vo'!LY
* @author treeroot n9hm790x-
* @since 2006-2-2 ;b%{ilx:
* @version 1.0 A7-r<s
*/ <94G
public class SortUtil { bEH de*q(
public final static int INSERT = 1; .BZVX=x
public final static int BUBBLE = 2; .v`b[4M4
public final static int SELECTION = 3; e~\QE0Oe:
public final static int SHELL = 4; zlf}.
public final static int QUICK = 5; Hi,t@!!
public final static int IMPROVED_QUICK = 6; ffcLuXa
public final static int MERGE = 7; h)x_zZ%>o
public final static int IMPROVED_MERGE = 8; RA/EpD:H
public final static int HEAP = 9; ps1@d[n
sH!O0WL
public static void sort(int[] data) { lZ+!H=`
sort(data, IMPROVED_QUICK); <!'M} s
} x:z0EYL
private static String[] name={ WjMRH+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t#b0H)
}; .p@N:)W6
<,8l *1C
private static Sort[] impl=new Sort[]{ 2qj{n+
new InsertSort(), V[hK2rVH.
new BubbleSort(), \,xFg w4
new SelectionSort(), ~1(j&&kXet
new ShellSort(), t/p $
new QuickSort(), ae`|ic
new ImprovedQuickSort(), UQ8bN I7
new MergeSort(), Omyt2`q
new ImprovedMergeSort(), IF_DZ
new HeapSort() \7 a4uc
}; J)x3\[}Ye
c{3rl;Cs
public static String toString(int algorithm){ s:|M].
return name[algorithm-1]; y!Cc?$]_Y
} ^^?q$1k6r*
l},NcPL`
public static void sort(int[] data, int algorithm) { gA^q^>7
impl[algorithm-1].sort(data); 8b&uU [
} ,Ww
SBfFZw)
public static interface Sort { #Ob]]!y
public void sort(int[] data); T{Zwm!s
} v%91k
B@K[3
public static void swap(int[] data, int i, int j) { {=JF=8@A
int temp = data; Px;Cg 6
data = data[j]; T[uDZYx
data[j] = temp; ]> G&jd7
} igkz2SI
} M7dU@Ag