[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; B,|M
} Yca9G?^\v
int i1=l; ,LWM}L
int i2=mid+1; :h*20iP
for(int cur=l;cur<=r;cur++){ -5kq9Dy\,
if(i1==mid+1) sVaWg?=qs'
data[cur]=temp[i2++]; <`*6;j.&
else if(i2>r) u=#LY$
data[cur]=temp[i1++]; (= uwx#
else if(temp[i1] data[cur]=temp[i1++]; ?GB($D=Y'&
else cV)fe`Gg
data[cur]=temp[i2++]; ,t61IU3"
} ]Fl+^aLS
} 9BNAj-Xa
[WX+/pm7>
} X1#D}
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改进后的归并排序: U7tT
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package org.rut.util.algorithm.support; WO^smCk
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import org.rut.util.algorithm.SortUtil; bq<QUw=]q&
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/** dq"b_pr;
* @author treeroot X f!Bsp#\g
* @since 2006-2-2 RZm5[n
* @version 1.0 0MrtJNF]_O
*/ r"Pj,}$A
public class ImprovedMergeSort implements SortUtil.Sort { REnRpp$
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private static final int THRESHOLD = 10; dGP*bMCT
L.l%EcW=,
/* _BtppQIWv
* (non-Javadoc) 8y~ Jn~t
* a%*W^R9Ls
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @\u)k
*/ %jKR\f G
public void sort(int[] data) { @Eqc&v!O
int[] temp=new int[data.length]; g%1!YvS3v
mergeSort(data,temp,0,data.length-1); 91mXvQ:u
} #x)G2T'?
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private void mergeSort(int[] data, int[] temp, int l, int r) { =lr*zeHLC
int i, j, k; hLYSYMUb
int mid = (l + r) / 2; ^ylJ_lN&=1
if (l == r) !ny;YV
return; A}OV>yM
if ((mid - l) >= THRESHOLD) %w/o#*j<;
mergeSort(data, temp, l, mid); >^D"%Oj y
else kh^AH6{2
insertSort(data, l, mid - l + 1); >`'#4!}G5j
if ((r - mid) > THRESHOLD) ZV_mP'1*
mergeSort(data, temp, mid + 1, r); {BY`Wu:w
else ~k|~Q\
insertSort(data, mid + 1, r - mid); mZ ONxR6q$
Drk9F"J
for (i = l; i <= mid; i++) { c^A3|tCi
temp = data; cS4e}\q,
} +g7Iu! cA
for (j = 1; j <= r - mid; j++) { )1~4Tl,S
temp[r - j + 1] = data[j + mid]; im*QaO%a4
} _ nS';48
int a = temp[l]; 0pBlmPafY
int b = temp[r]; 4-ZiKM
for (i = l, j = r, k = l; k <= r; k++) { Ibd7[A\
if (a < b) { 5(2g*I
data[k] = temp[i++]; E)#3*Wlu$
a = temp; @l$cZie
} else { wf6ZzG:
data[k] = temp[j--]; P.&,nFIg3
b = temp[j]; N#Qby4w >
} X7NRQ3P@
} TnPdpynP
} 1p+2*c
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/** ib/&8)Y+J
* @param data VskyRxfdW3
* @param l 3L=vsvO4
* @param i 0(@8
*/ /<zBcpVNV
private void insertSort(int[] data, int start, int len) { Il~ph9{JH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0-l @U{
} TcO@q ]+S
} &q``CCOF&
} P[#V{%f*5
} )I.[@#-
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堆排序： r}D`15IHJ
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package org.rut.util.algorithm.support; hb_YdnG
e|"`W`"-
import org.rut.util.algorithm.SortUtil; uH65DI<
QmbD%kW`3
/** niqiDT/
* @author treeroot NrNbNFfo
* @since 2006-2-2 y?CEV-3+
* @version 1.0 bYgrKz@uK
*/ _d %H;<_
public class HeapSort implements SortUtil.Sort{ 224I%x.,
8yB
/* (non-Javadoc) v)okVyv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -'5:Cq
*/ B~caHG1b
public void sort(int[] data) { z)]_(zZ^
MaxHeap h=new MaxHeap(); PZeVjL?E
h.init(data); h+t{z"Ic=
for(int i=0;i h.remove(); A4Q8^^byY
System.arraycopy(h.queue,1,data,0,data.length); h1FM)n[E7
} My,ki:V?g6
d_1w 9FA
private static class MaxHeap{ EoIP#Cnd1
bkLm]n3
void init(int[] data){ [fxAj]
this.queue=new int[data.length+1]; T AwA)Zg
for(int i=0;i queue[++size]=data; 7W5FHZd'
fixUp(size); zRL[.O9
} ! Hdg $,
} H2E!A2\m
K$R1x1lc2
private int size=0; &]16Hb~
}yK_2zak5i
private int[] queue; W*}q;ub;
;]KGRT
public int get() { b H?dyS6Bx
return queue[1]; #RbPNVs
} '7u#uL,pa1
u"?cmg<.1
public void remove() { $X WJxQRUv
SortUtil.swap(queue,1,size--); {S'xZ._=
fixDown(1); >|XQfavE
} @&83/U?
file://fixdown A_CEpG]
private void fixDown(int k) { 2oGl"3/p
int j; M_Z*F!al<
while ((j = k << 1) <= size) { 7'J}|m{7
if (j < size %26amp;%26amp; queue[j] j++; j42U|CuK
if (queue[k]>queue[j]) file://不用交换 ) e;)9~
break; z,X ^;
SortUtil.swap(queue,j,k); ^ :6v- Yx
k = j; Yvs9)g
} N6Vn/7I5%
} 6AUXYbK,
private void fixUp(int k) { XB50>??NE
while (k > 1) { iVFHr<zk
int j = k >> 1; o'D{ql
if (queue[j]>queue[k]) ,*bI0mFZ
break; T&tCXi
SortUtil.swap(queue,j,k); Tm.(gK
k = j; .B6$U>>NS^
} _^0yE_ili
} neoT\HV
4u"V52
} rgRh ySud
A+iQH1C0h
} eeoIf4]
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SortUtil： iRPt0?$
Q|"{<2"]U0
package org.rut.util.algorithm; cPPE8}PVH
1Ty{k^%
import org.rut.util.algorithm.support.BubbleSort; Y6?d y\
import org.rut.util.algorithm.support.HeapSort; BBnj}XP*4
import org.rut.util.algorithm.support.ImprovedMergeSort; /=FQ{tLr
import org.rut.util.algorithm.support.ImprovedQuickSort; zX"@QB3E
import org.rut.util.algorithm.support.InsertSort; DHaSBk
import org.rut.util.algorithm.support.MergeSort; )^|zuYzN
import org.rut.util.algorithm.support.QuickSort; ]mn(lK
import org.rut.util.algorithm.support.SelectionSort; 0"ZB|^c=
import org.rut.util.algorithm.support.ShellSort; _o8il3
yLW iY~Fd
/** Vx~[;*{,C9
* @author treeroot #?@k=e\
* @since 2006-2-2 ZcYxH|Gn
* @version 1.0 i jg'X#E
*/ |FS79Bv
public class SortUtil { OU]!2[7c
public final static int INSERT = 1; so9h6K{qcp
public final static int BUBBLE = 2; W&;X+XA_W
public final static int SELECTION = 3; S_y!4;]ox
public final static int SHELL = 4; 3G~ T_J&
public final static int QUICK = 5; B;SYO>.W
public final static int IMPROVED_QUICK = 6; _W@q%L>
public final static int MERGE = 7; 0mF3Vs`-Q
public final static int IMPROVED_MERGE = 8; IMmoq={(z
public final static int HEAP = 9; ;4z6="<Y
&\F`M|c
public static void sort(int[] data) { g|9'Lk
sort(data, IMPROVED_QUICK); R.Ao%VT
} 8*V3g_z
private static String[] name={ :5L9tNr{_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -|~6Zf"
}; DDwH9*
4l@*x^F
private static Sort[] impl=new Sort[]{ G[)Ll=
new InsertSort(), Ep|W>
new BubbleSort(), Eyxw.,rB/
new SelectionSort(), K=;z&E=<c
new ShellSort(), a-MDZT<xA+
new QuickSort(), 5)wz`OS
new ImprovedQuickSort(), razVO]]E
new MergeSort(), l5b? 'L
new ImprovedMergeSort(), .,)NDG4Q
new HeapSort() 0V uG(O
}; @{+c6.*}
s_N?Y)lS+(
public static String toString(int algorithm){ 6wYd)MDLL
return name[algorithm-1]; lM3UjR|@
} n-be8p)-
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public static void sort(int[] data, int algorithm) { XkHO=
impl[algorithm-1].sort(data); oP$NTy[
} X2 c<.
9fp1*d
public static interface Sort { [[}KCND
public void sort(int[] data); QmvhmsDL
} ^w5`YI4<
V:4]]z L}
public static void swap(int[] data, int i, int j) { th}Q`vg0
int temp = data; Y,RBTH
data = data[j]; c:.k2u
data[j] = temp; 3fgVvt-2
} h2#G
} \{ r%.G