[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; h.4qlx|
} ysSjc
int i1=l; qy7hkq.uX
int i2=mid+1; fbh6Ls/
for(int cur=l;cur<=r;cur++){ ;=5@h!@R
if(i1==mid+1) Qa,NGP.
data[cur]=temp[i2++]; itqQ)\W
else if(i2>r) GN:Ru|n
data[cur]=temp[i1++]; s jL*I
else if(temp[i1] data[cur]=temp[i1++]; S+.21,
else ri/t(m^{W
data[cur]=temp[i2++]; yPf?"W
} ! 6p>P4TT
} MuDFdbtR
Q `e~MD
} >:w?qEaE
y;,=ajrF
改进后的归并排序: EzzTJ>
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package org.rut.util.algorithm.support; ~/^y.SsWM
mV6#!_"
import org.rut.util.algorithm.SortUtil; a(PjcQ4dY
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/** G*kE~s9R
* @author treeroot 07.nq;/R
* @since 2006-2-2 lTa1pp Zw
* @version 1.0 u/z,92mmS
*/ 8ku? W
public class ImprovedMergeSort implements SortUtil.Sort { d4jVdOq2
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private static final int THRESHOLD = 10; ((Vj]I% ;
4^ c!_K&&
/* x1|Da$2
* (non-Javadoc) I["F+kt^^
* *e(:["v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T&o,I
*/ NY4!TOp
public void sort(int[] data) { 4fu'QZ(}
int[] temp=new int[data.length]; 5Waw?1GL
mergeSort(data,temp,0,data.length-1); Wr]O
} fm3(70F\
' oBo|
private void mergeSort(int[] data, int[] temp, int l, int r) { l'|E,N>X
int i, j, k; \BN|?r$a
int mid = (l + r) / 2; wY' "ab
if (l == r) M%7`8KQ
return; $-m@KB
if ((mid - l) >= THRESHOLD) 9uuta4&uI
mergeSort(data, temp, l, mid); i?ZA x4D
else oR-O~_)U
insertSort(data, l, mid - l + 1); Z1VC5*K
if ((r - mid) > THRESHOLD) " <<A
mergeSort(data, temp, mid + 1, r); 7sj<|g<h(_
else U5|B9%:&
insertSort(data, mid + 1, r - mid); G1kDM.L
`-~`<#E[
for (i = l; i <= mid; i++) { x}v1X`6b
temp = data; &J\B\`
} $8jaapNm@
for (j = 1; j <= r - mid; j++) { (F/HU"C
temp[r - j + 1] = data[j + mid]; #]?tY}~
} EC<5M5Lc
int a = temp[l]; $kD7y5
int b = temp[r]; -<8B,
for (i = l, j = r, k = l; k <= r; k++) { ]PeLcB
if (a < b) { ^&C&~}Zv
data[k] = temp[i++]; uK"^*NEC';
a = temp; -oU@D
} else { Hr(6TLNw
data[k] = temp[j--]; D0f*eSXE{
b = temp[j]; Y [4vRzc
} 4S'[\ZJO
} E3y6c)<
} cZ^wQ5=
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/** Ud$Q0m&
* @param data ])eOa%
* @param l U9x4j_.q
* @param i pfR"s:#
*/ +eU`H[iu
private void insertSort(int[] data, int start, int len) { ?2/uSG|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w-r_H!-
} Ft3I>=f{
} BlL|s=dlQV
} w2k<)3 g~
} -<xyC8$^$
:MK=h;5Z
堆排序： B#1:Y;Z
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package org.rut.util.algorithm.support; hXNH"0VCV
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import org.rut.util.algorithm.SortUtil; ;{Xy`{Cg!
F{;; :
/** Ky *DfQA
* @author treeroot 4ffU;6~l'
* @since 2006-2-2 ~xw5\Y^
* @version 1.0 ,`yyR:F
*/ 4b]_ #7Qm
public class HeapSort implements SortUtil.Sort{ I|Z/`9T
Np$z%ewK.
/* (non-Javadoc) ^,+nef?=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6nc0=~='$
*/ FW_G\W.
public void sort(int[] data) { Vz'HM$
MaxHeap h=new MaxHeap(); F,Q?s9s
h.init(data); R'L?Xn}3
for(int i=0;i h.remove(); {H+?z<BF<
System.arraycopy(h.queue,1,data,0,data.length); J,RDTXqn
} !I~C0u
n3'dLJH|
private static class MaxHeap{ lw s(/a*c
sllzno2bU
void init(int[] data){ ]dq5hkjpU
this.queue=new int[data.length+1]; =rEA:Q`~w
for(int i=0;i queue[++size]=data; @^'$r&M
fixUp(size); wDMjk2YN
} Ssw&'B|o
} #\LZ;&T'N
Nl {7
private int size=0; V'j@K!)~xR
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private int[] queue; o*-9J2V=J
-3` "E%9
public int get() { N};t<Xev
return queue[1]; a&C.=
} 7lwTZ*rnY
M'DWu|dIBA
public void remove() { '#A:.P
SortUtil.swap(queue,1,size--); Xk?R mU6
fixDown(1); e{0L%%2K
} x~EKGoz3
file://fixdown tfA}`*$s
private void fixDown(int k) { %kq ^]S2O
int j; yc[(lq.^n
while ((j = k << 1) <= size) { 8bt53ta
if (j < size %26amp;%26amp; queue[j] j++; 9#Bx]wy
if (queue[k]>queue[j]) file://不用交换 ;gUXvx~~r
break; Pxqiv9D<R
SortUtil.swap(queue,j,k); =-Nsc1&
k = j; ;\x~'@
} HxZ.OZbR
} ;SKcbws
private void fixUp(int k) { LQqfi ~
while (k > 1) { q? 9GrwL8F
int j = k >> 1; ]IS;\~
if (queue[j]>queue[k]) 1Cv#nhmp
break; 84^[/d;!
SortUtil.swap(queue,j,k); E MQ4yK
k = j; dMV=jJ%Y
} CU$)QH{
} #9\THfb
q$T8bh,2
} 4sIXO
GmA!Mo
} i4<BDX5
*T1~)z}j<
SortUtil： =Dk7RKoHF
@\jQoaLT$_
package org.rut.util.algorithm; I+" lrU
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import org.rut.util.algorithm.support.BubbleSort; ZdH1nX(Yh3
import org.rut.util.algorithm.support.HeapSort; oRq3 pO}f
import org.rut.util.algorithm.support.ImprovedMergeSort; .,M;huRg
import org.rut.util.algorithm.support.ImprovedQuickSort; !y. $J<
import org.rut.util.algorithm.support.InsertSort; \I:.<2i
import org.rut.util.algorithm.support.MergeSort; aMJ;bQD
import org.rut.util.algorithm.support.QuickSort; W#{la`#Bu
import org.rut.util.algorithm.support.SelectionSort; h/K@IAd
import org.rut.util.algorithm.support.ShellSort; .$0Pr%0pWI
C ) ?uE'
/** 5g>wV
* @author treeroot CTp!di|
* @since 2006-2-2 7$7n71o
* @version 1.0 H\#:,s{1
*/ ")%r}:0
public class SortUtil { [!~}S
public final static int INSERT = 1; q@ZlJ3%l,
public final static int BUBBLE = 2; |')-VhLLK
public final static int SELECTION = 3; cDeZMsV
public final static int SHELL = 4; utH%y\NMF|
public final static int QUICK = 5; ,E}$[mHyjz
public final static int IMPROVED_QUICK = 6; [l*;E f,
public final static int MERGE = 7; mU@xcN
public final static int IMPROVED_MERGE = 8; 8TPN#"
public final static int HEAP = 9; 3=- })X;
!re1EL
public static void sort(int[] data) { `!i-#~n
sort(data, IMPROVED_QUICK); /:p8I6;
} :1;Q(9:v
private static String[] name={ %K1")s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u7].}60.'
}; z"UPyW1?
1bSD,;$sQ
private static Sort[] impl=new Sort[]{ `R+,1"5=
new InsertSort(), [@G`Afaf
new BubbleSort(), "U8S81'
new SelectionSort(), ^npJUa
new ShellSort(), }C,O
new QuickSort(), w4%AJmt
new ImprovedQuickSort(), {Uq:Xw
new MergeSort(), H;S%Y`V
new ImprovedMergeSort(), |=5/Rax^
new HeapSort() 0+`Pg
}; hO( RZ'{
H~o <AmE0!
public static String toString(int algorithm){ |"7Y52d
return name[algorithm-1]; .'d2J>~N
} Yb:pAzw6
!9 f4R/ ?
public static void sort(int[] data, int algorithm) { c-8!#~M(
impl[algorithm-1].sort(data); z<&m*0WYA
} Lh ap4:
/!T> b:0
public static interface Sort { R#eg^7HfX
public void sort(int[] data); F,T~\gO5,
} &HDP!SLS
[BDGR B7d"
public static void swap(int[] data, int i, int j) { M_|> kp
int temp = data; !w2gGy:I>
data = data[j]; f/y`
data[j] = temp; DWm SC}{.
} n:4uA`Vg
} Z cpmquf8L