[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; "Doz~R\\
} #A\@)wJ
int i1=l; f}=>c|Do
int i2=mid+1; uVN2}3!)Y
for(int cur=l;cur<=r;cur++){ #Pt_<?JtV
if(i1==mid+1) fN&@y$
data[cur]=temp[i2++]; E6XDn`:
else if(i2>r) HAwdu1$8
data[cur]=temp[i1++]; c^3,e/H
else if(temp[i1] data[cur]=temp[i1++]; _0}u0fk
else !y+uQ_IS@
data[cur]=temp[i2++]; {>g{+Eq
} *+(rQ";x
} gWQ(B
7vTzY%v
} 'hR0JXy
9:R3+,ZN
改进后的归并排序: K @RGvP
6%it`A8}
package org.rut.util.algorithm.support; zX lcu_rc
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import org.rut.util.algorithm.SortUtil; >$,P )cB'
=WT&unw}
/** oz:"w nX
* @author treeroot DSQ2|{
* @since 2006-2-2 ZLP/&`>8
* @version 1.0 PriLV4?
*/ x ]">
public class ImprovedMergeSort implements SortUtil.Sort { X$e*s\4
LTxP@pr
private static final int THRESHOLD = 10; p4V*%A&w
wx^Det
/* i\<S ;
* (non-Javadoc) Z_[ P7P
* 3\2%i6W6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @R%*;)*F
*/ fLnwA|n=
public void sort(int[] data) { h4jo<yp\
int[] temp=new int[data.length]; KLvAe>#,
mergeSort(data,temp,0,data.length-1); XLC9B3Jt
} d?&`ZVl
,Kl:4 Tv
private void mergeSort(int[] data, int[] temp, int l, int r) { " i:[|7
int i, j, k; !m^;wkrY
int mid = (l + r) / 2; ").gPmC
if (l == r) "I66@d?
return; (?m{G Q
if ((mid - l) >= THRESHOLD) ltfKqY-
mergeSort(data, temp, l, mid); C7ug\_,s
else H1f='k]SZ
insertSort(data, l, mid - l + 1); o3V\
if ((r - mid) > THRESHOLD) gUNhN1=
mergeSort(data, temp, mid + 1, r); :`e#I/,
else _aR{B-E
insertSort(data, mid + 1, r - mid); Kf1J;*i|\
+l^tT&s;f
for (i = l; i <= mid; i++) { 9j|v D
temp = data; ;Ax-f04gG
} q[_qZ
for (j = 1; j <= r - mid; j++) { )w0x{_
temp[r - j + 1] = data[j + mid]; QuqznYSY{
} qmFG
int a = temp[l]; g!R7CRt%
int b = temp[r]; .6P.r}
for (i = l, j = r, k = l; k <= r; k++) { 0W(mx-[H/
if (a < b) { gE _+r
data[k] = temp[i++]; n9xP8<w8
a = temp; "aOs#4N
} else { 9T;4aP>6j#
data[k] = temp[j--]; kzKej"a;
b = temp[j]; db~^Gqv6k
} U3X5tED
} 4d`YZNvZW/
} /QY F|%7!
)[ A-d(y=
/** hE|P|0U,n
* @param data !\X9$4po@
* @param l ~f h
* @param i >x{("``D0y
*/ . :Skc
private void insertSort(int[] data, int start, int len) { cc|W1,q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HEBeJ2w
} >G:Q/3jh
} x"{aO6M
} >\d&LLAe
} h+}BtKA
u#,8bw?1
堆排序： O;H6`JQ
TI'v /=;)
package org.rut.util.algorithm.support; ]xQv\u
uZC=]Ieh
import org.rut.util.algorithm.SortUtil; 4yxQq7 m,
@|\9<S
/** d5$D[,`1
* @author treeroot z:>cQUYl
* @since 2006-2-2 L}`/v]E"eU
* @version 1.0 @@AL@.*
*/ `}EnY@*h
public class HeapSort implements SortUtil.Sort{ pR61bl)
4j#y?^s
/* (non-Javadoc) 4yyw:"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) suY47DCX)
*/ nGH6D2!F
public void sort(int[] data) { 0$*7lQ<a#M
MaxHeap h=new MaxHeap(); wXIRn?z
h.init(data); \N9=13W<lK
for(int i=0;i h.remove(); n9B5D:.G
System.arraycopy(h.queue,1,data,0,data.length); YzESVTh
} tF:AnNp=
qX,q*hr-
private static class MaxHeap{ #L*\^ c
`HX:U3/
void init(int[] data){ IRN,=
this.queue=new int[data.length+1]; MgeC-XQM
for(int i=0;i queue[++size]=data; W_W!v&@E=
fixUp(size); y bhFDx
} fx;rMGa
} B[N]=V
0V:H/qu8>
private int size=0; ^&qK\m_A
B!wN%>U
private int[] queue; Bgxk>Y
ZC?~RXL(
public int get() { ~<[+!&<U
return queue[1]; Z[#8F&QV!m
} t\M6 d6
WZ'<iI
public void remove() { ?(9*@
SortUtil.swap(queue,1,size--); 2j-l<!s
fixDown(1); w|f+OlPXq
} evyjHcCx
file://fixdown In?rQiD9
private void fixDown(int k) { W>jKWi,{
int j; HZ9>4G3
while ((j = k << 1) <= size) { &{Z+p(3Gj
if (j < size %26amp;%26amp; queue[j] j++; |Yli~Qx
if (queue[k]>queue[j]) file://不用交换 9C7Npf?~M
break; /dCsZA
SortUtil.swap(queue,j,k); E-WpsNJ)X
k = j; :W)lt28_
} e)}E&D;${
} <-1:o*8:}
private void fixUp(int k) { )7.)fY$
while (k > 1) { lat5n&RP Y
int j = k >> 1; [[[C`H@
if (queue[j]>queue[k]) X5o*8Bg4M
break; ?=7k<a~
SortUtil.swap(queue,j,k); {iyJHY
k = j; lf-.c$.>
} /4+L2O[
} ndFVP;q
G&h@
} .5\@G b.8
;L$-_Z
} 7)U ik}0
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SortUtil： P].Eb7I
s17)zi,?4
package org.rut.util.algorithm; Tv#d>ZSD
S:{xx`6K
import org.rut.util.algorithm.support.BubbleSort; |dxWO
import org.rut.util.algorithm.support.HeapSort; g{Av =66Z
import org.rut.util.algorithm.support.ImprovedMergeSort; )"?'~5A
import org.rut.util.algorithm.support.ImprovedQuickSort; s/ABT.ZO
import org.rut.util.algorithm.support.InsertSort; Gd|kAC g
import org.rut.util.algorithm.support.MergeSort; %<^^ Mw
import org.rut.util.algorithm.support.QuickSort; B9,39rG/7+
import org.rut.util.algorithm.support.SelectionSort; A,&711Y
import org.rut.util.algorithm.support.ShellSort; )&E]
=oVC*b
/** ;%0kzIvP
* @author treeroot j=pg5T
* @since 2006-2-2 V]Te_ >E;w
* @version 1.0 @|cHDltH
*/ h1?xfdvGd
public class SortUtil { mxEe -q
public final static int INSERT = 1; )*_G/<N)|
public final static int BUBBLE = 2; u3Z]!l
public final static int SELECTION = 3; rV\G/)xL
public final static int SHELL = 4; @_t=0Rc
public final static int QUICK = 5; [PN2^
public final static int IMPROVED_QUICK = 6; <#8}![3Q
public final static int MERGE = 7; onmpMU7w
public final static int IMPROVED_MERGE = 8; 4Y'Ne2M{
public final static int HEAP = 9; $S' TW3
}Tk:?U{
public static void sort(int[] data) { 0,-]O=
sort(data, IMPROVED_QUICK); I~6(>Z{
} XzIC~}
private static String[] name={ Ae=JG8Ht~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '0~?zP
}; u`wD6&y*
3{.]!
private static Sort[] impl=new Sort[]{ dSKvs"
new InsertSort(), P0; y
new BubbleSort(), :LB*l5\
new SelectionSort(), 4S*ifl
new ShellSort(), N"<.v6Z
new QuickSort(), 0'f\>4B
new ImprovedQuickSort(), S@!_{da
new MergeSort(), I++ Le%w
new ImprovedMergeSort(), #/Ob_~-?j
new HeapSort() g?|Z/eVJ
}; @r[SqGa:
G>:v1lde
public static String toString(int algorithm){ #-Mr3
return name[algorithm-1]; ae-tAA[1Y
} BPkL3Ev1V
LmyaC2
public static void sort(int[] data, int algorithm) { fe<7D\Sp@
impl[algorithm-1].sort(data); 6:S, {@G
} i`f!)1
$DfK}CT
public static interface Sort { \IC^z
public void sort(int[] data); WJ-.?
} 4".I*ij
&b^_~hB:q
public static void swap(int[] data, int i, int j) { <uBRLe`)
int temp = data; D=vw0Q_3Y3
data = data[j]; )uAY_()/
data[j] = temp; R}w}G6"\
} qT$IV\;_
} vO$cF*