[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; j+gh*\:q
} S+^hK1jL
int i1=l; X%B$*y5
int i2=mid+1; !tx.2m*5
for(int cur=l;cur<=r;cur++){ gv(MX ;B#
if(i1==mid+1) ![]6| G&
data[cur]=temp[i2++]; bwszfPM
else if(i2>r) 4/ q BD
data[cur]=temp[i1++]; +Oo-8f*
else if(temp[i1] data[cur]=temp[i1++]; ;'[?H0Jw'
else y~M6
data[cur]=temp[i2++]; %t74*cX
} M[-/&;`f@
} fwUF5Y
`/i/AZ{
} Y$./!lVY
_c:th{*
改进后的归并排序: ,KPrUM}
9.#")%_p
package org.rut.util.algorithm.support; #8BI`.t)j
pQ4HX)<P
import org.rut.util.algorithm.SortUtil; ~[BGKqh
PB BJ.!Pb
/** '[_.mx|cd`
* @author treeroot FBzsM7]j
* @since 2006-2-2 a6It1%a+
* @version 1.0 MFWkJbZV
*/ k!WeE#"(
public class ImprovedMergeSort implements SortUtil.Sort { ``{GU}n
x>A[~s"|N
private static final int THRESHOLD = 10; xnw'&E
(VHPcoL
/* :eevc7
* (non-Javadoc) R4DfqX
* :RBeq,QaO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iHQ$L# 7
*/ Z;0<k;#T(p
public void sort(int[] data) { *#?9@0b@
int[] temp=new int[data.length]; EF9Y=(0|
mergeSort(data,temp,0,data.length-1); |;p.!FO
} 4gmlK,a
9gIim
private void mergeSort(int[] data, int[] temp, int l, int r) { /h]ru SI
int i, j, k; iorQ/(
int mid = (l + r) / 2; <KoOJMx(
if (l == r) z 61Fq
return; e9QjRx
if ((mid - l) >= THRESHOLD) G"6XJYoI
mergeSort(data, temp, l, mid); Vk[M .=J
else Y%r>=Jvu6
insertSort(data, l, mid - l + 1); qIh9? |`U
if ((r - mid) > THRESHOLD) `ah"Q;d$
mergeSort(data, temp, mid + 1, r); N6%L4v8-}X
else cBZJ
insertSort(data, mid + 1, r - mid); 5HY0 *\
/paZJ}Pr.
for (i = l; i <= mid; i++) { sEL0h4
temp = data; zq3f@xOK
} pXA|'U5]
for (j = 1; j <= r - mid; j++) { <HpUP!q8v
temp[r - j + 1] = data[j + mid]; Ufor>
} t"MrrK>T
int a = temp[l]; ;Uy}(
int b = temp[r]; r-]%R:U*
for (i = l, j = r, k = l; k <= r; k++) { w:=:D=xH2
if (a < b) { ={o)82LV
data[k] = temp[i++]; lB#7j
a = temp; 5as5{"l
} else { WHUl.h
data[k] = temp[j--]; "\5 T 6
b = temp[j]; GsiKL4|mj
} h1f 05
} HoeW6UV
} T;S6<J
]kO|kIs
/** VAqZ`y
* @param data ~K(mt0T)
* @param l BV}sN{
* @param i WfTl\Dxw
*/ dqFp"Xe"%
private void insertSort(int[] data, int start, int len) { Z4gn7 'V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *|;`Gp
} 0c,!<\B
} @V^5_K
} y!q`o$nK
} b+$wx~PLi
;r.#|b
堆排序： 0eK>QZ_
"/3YV%to-#
package org.rut.util.algorithm.support; {)Shc;Qh
um2}XI
import org.rut.util.algorithm.SortUtil; Wq}W )E
nmyDGuzk
/** >Y|P+Z\7
* @author treeroot by,3A
* @since 2006-2-2 vRDs~'f
* @version 1.0 =&DuQvN,
*/ sJ5#T iX
public class HeapSort implements SortUtil.Sort{ %D% Ok7s})
15Jc PDV
/* (non-Javadoc) >?ec"P%vS/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {L7+lz
*/ 8VC%4+.FF
public void sort(int[] data) { tOo\s&j
MaxHeap h=new MaxHeap(); ogJ';i/o
h.init(data); ([7XtG/?
for(int i=0;i h.remove(); ,8!'jE[d
System.arraycopy(h.queue,1,data,0,data.length); = U[$i"+
} H%i [;
u Qg$hS
private static class MaxHeap{ 8CH9&N5W5t
6#a82_
void init(int[] data){ C+dz0u3s
this.queue=new int[data.length+1]; 'X?Iho
for(int i=0;i queue[++size]=data; JLg/fB3%
fixUp(size); OAgZeK$
} )XoMOz
} DwWm(8&6;}
*V[I&dKq
private int size=0; z>'vS+axV
Fw#1?/K~
private int[] queue; DV)NY!
8~BLTZ
public int get() { |A+,M"F?
return queue[1]; i8f+woZL
} bh3yH>Zns
wT-Kg=-q
public void remove() { 0}'/3Q
SortUtil.swap(queue,1,size--); B^{~,'
fixDown(1); HC6v#-( `{
} (aq-aum-I
file://fixdown Rv.IHSQUo
private void fixDown(int k) { vV"I}L
int j; QcjsQTAbk
while ((j = k << 1) <= size) { 2av=W
if (j < size %26amp;%26amp; queue[j] j++; 7Rc>LI* '
if (queue[k]>queue[j]) file://不用交换 6:Y2z!MLO
break; D'^UZZlI^I
SortUtil.swap(queue,j,k); @twi<U_
k = j; r>sXvzv
} /fU-0a8
} X}ihYM3y/
private void fixUp(int k) { m9\~dD
while (k > 1) { @CoUFdbz
int j = k >> 1; vZ^U]h V
if (queue[j]>queue[k]) 7 ;2>kgf~
break; j8^zE,Z
SortUtil.swap(queue,j,k); m8+ EMBl
k = j; }?HWUAL\
} A-rj: k!
} #nmh=G?\Sm
8>xd
} Lg7dJnf
p1T0FBV L
} %MCS_'N J
,F+,A].wG
SortUtil： >\3N#S"PF
j9-.bGtm?.
package org.rut.util.algorithm; BA8!NR|
AOz~@i^
import org.rut.util.algorithm.support.BubbleSort; +4Q1s?`
import org.rut.util.algorithm.support.HeapSort; 7;Vmbt9
import org.rut.util.algorithm.support.ImprovedMergeSort; '?LqVzZI
import org.rut.util.algorithm.support.ImprovedQuickSort; -<e_^
import org.rut.util.algorithm.support.InsertSort; /"^XrVi-
import org.rut.util.algorithm.support.MergeSort; =?N$0F!
import org.rut.util.algorithm.support.QuickSort; 6}Rb-\N
import org.rut.util.algorithm.support.SelectionSort; <)"i'v $
import org.rut.util.algorithm.support.ShellSort; (`R heEg@f
&!FI!T -WH
/** }FX:sa?5
* @author treeroot fUOQ(BGp
* @since 2006-2-2 HYZp=*eb
* @version 1.0 lsgZ
*/ z f>(Y7M
public class SortUtil { o|_9%o52'
public final static int INSERT = 1; _BvGEM`o
public final static int BUBBLE = 2; WmRu3O
public final static int SELECTION = 3; IGlM} ?x
public final static int SHELL = 4; }Nma %6PfV
public final static int QUICK = 5; EoS6t
public final static int IMPROVED_QUICK = 6; g!)*CP#;
public final static int MERGE = 7; 5,\|XQA5!
public final static int IMPROVED_MERGE = 8; E 5mYFVK
public final static int HEAP = 9; ( efxw
m6Qm }""
public static void sort(int[] data) { Z|A+\#'
sort(data, IMPROVED_QUICK); M<Y{Cs
} p<y\^a
private static String[] name={ RcZ&/MY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vYq"W%
}; kovJ9
Sw>,Q-32
private static Sort[] impl=new Sort[]{ t@iw&>8z
new InsertSort(), E5Ls/ HK
new BubbleSort(), O(:/&`)
new SelectionSort(), r[#*..Y
new ShellSort(), ?KE:KV[Y
new QuickSort(), @ 0/EKWF
new ImprovedQuickSort(), $J0o%9K
new MergeSort(), !LsIHDs4
new ImprovedMergeSort(), R~;8v1>K
new HeapSort() 7&(h_}Z
}; ke)<E98DC
,pUB[w\
public static String toString(int algorithm){ }*vE/W
return name[algorithm-1]; +,)Iv_Xl$
} JZJb&q){
R?Ch8mW.!
public static void sort(int[] data, int algorithm) { };f^*KZ=0
impl[algorithm-1].sort(data); Kp!A ay
} ]H<}6}Gd
V|/N-3M
public static interface Sort { ?.c:k;j
public void sort(int[] data); 6w_TL<S
} |;"(C# B
?uW} XAi
public static void swap(int[] data, int i, int j) { Cn_r?1{W
int temp = data; M} +s_h9
data = data[j]; Fz5eCe\B
data[j] = temp; Ci2*5n<
} lbh7`xCR
} /XdLdA!v