[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; }4'5R
} 2% ],0,o
int i1=l; +XL^dzN[|$
int i2=mid+1; p5RnFe l
for(int cur=l;cur<=r;cur++){ KO*# ^+g
if(i1==mid+1) z$#q'+$
data[cur]=temp[i2++]; 5q<cZ)v#&
else if(i2>r) NXwthc3
data[cur]=temp[i1++]; \YXzq<7
else if(temp[i1] data[cur]=temp[i1++]; }_,\yC9F
else T!-*;yu
data[cur]=temp[i2++]; +qN}oyL
} j1[Ng #.
} T22 4L.?
MR")
} rw:z|-r
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改进后的归并排序: zVEG) Hr
T'VZ=l[
package org.rut.util.algorithm.support; 9i9'Rd`g
S*"uXTS
import org.rut.util.algorithm.SortUtil; uJxT)m!/
dJYsn+
/** "AN*2)e4
* @author treeroot o2AfMSt.
* @since 2006-2-2 6}z-X*
* @version 1.0 aCxF{>n
*/ ,"6Bw|s
public class ImprovedMergeSort implements SortUtil.Sort { & OO0v*@{
(^_j,4
private static final int THRESHOLD = 10; @aQ};~
CGyw '0S
/* a^{"E8j
* (non-Javadoc) 2A>s a3\
* SSr#MIS?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &A/k{(.XP
*/ *A<vrkHz
public void sort(int[] data) { \zCw&#D0Z
int[] temp=new int[data.length]; _E\Cm
mergeSort(data,temp,0,data.length-1); V{A_\
} E`0mn7.t
9w)W|9
private void mergeSort(int[] data, int[] temp, int l, int r) { 1>~bzXY#
int i, j, k; 0H9UM*O
int mid = (l + r) / 2; G4&vrM,f
if (l == r) %P8*Az&]T
return; j\hI, mc
if ((mid - l) >= THRESHOLD) d76nyQKK
mergeSort(data, temp, l, mid); a:v5(@8
else LE@<)}Au^
insertSort(data, l, mid - l + 1); QUQw/
if ((r - mid) > THRESHOLD) Am'%tw ~
mergeSort(data, temp, mid + 1, r); M6nQ17\{
else `[)!4Jb
insertSort(data, mid + 1, r - mid); _^%DfMP3i\
-- >q=hlA
for (i = l; i <= mid; i++) { $@Bd}35 J
temp = data; -v@LJCK7I
} ]z77hcjB1
for (j = 1; j <= r - mid; j++) { cFD3
temp[r - j + 1] = data[j + mid]; rp&XzMwC4
} <%Al(Lm0
int a = temp[l]; gJ=y7yX
int b = temp[r]; W1;QPdz:
for (i = l, j = r, k = l; k <= r; k++) { Xp67l!{v
if (a < b) { >TQNrS^$J
data[k] = temp[i++]; s~p(59
a = temp; ;_~9".'<d
} else { 3< 'bi}{
data[k] = temp[j--]; 1m~-q4D)V
b = temp[j]; W9D~:>^YP
} <5 )F9.$
} $-i(xnU/nl
} ;T\+TZtI
dZWO6k9[H
/** Q8H+=L:
* @param data /R(]hmW
* @param l xYd]|y
* @param i btR~LJb
*/ pw.K,?kYr
private void insertSort(int[] data, int start, int len) { iJU=98q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H`bS::JI-
} iSP}kM}
} #3knKBH
} A8X3|<n=
} \\ZCi`O
]N;\AXZ7
堆排序： gyz_$T@x
X,A]<$ACu%
package org.rut.util.algorithm.support; ]x(cX&S-9
/lS5B6NU
import org.rut.util.algorithm.SortUtil; }'p"q)
%dwI;%0
/** hLICu[LC?
* @author treeroot 0FcG;i+
* @since 2006-2-2 cj\?vX\V
* @version 1.0 Ul<:Yt&nI
*/ Y|!m
public class HeapSort implements SortUtil.Sort{ G' '9eV$
QOR92}yC
/* (non-Javadoc) e>2KW5.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (O$il
*/ eH]9"^> o
public void sort(int[] data) { at+Nd K
MaxHeap h=new MaxHeap(); ]iYO}JuX
h.init(data); o~{rZ~
for(int i=0;i h.remove(); ' ~1/*F%8
System.arraycopy(h.queue,1,data,0,data.length); nv<t$r
} A2.GNk
~s{ V!)0
private static class MaxHeap{ {)n@Rq\=v
d:Oo5t)MN
void init(int[] data){ oZ_,WwnE
this.queue=new int[data.length+1]; LzQOzl@z
for(int i=0;i queue[++size]=data; 5AK@e|G$w
fixUp(size); o1Krp '*
} z2lT4SAv+
} wEF"'T
z"c,TlVN3
private int size=0; 4YSVy2x
Lz&FywF-l
private int[] queue; YU`}T<;bg
7<ZGNxZ~
public int get() { gHtflS
return queue[1]; f hjlt#
} (?xR<]~g*
t3b M4+n
public void remove() { 9H/C(Vo
SortUtil.swap(queue,1,size--); y(wb?86#W5
fixDown(1); _fdD4-2U
} V-(*{/^"
file://fixdown mX%T"_^
private void fixDown(int k) { t$&'mJ_-w
int j; 0g2rajS
while ((j = k << 1) <= size) { *P/DDRq(2
if (j < size %26amp;%26amp; queue[j] j++; +G6 Ge;
if (queue[k]>queue[j]) file://不用交换 A%cJ5dF8~
break; UX'q64F!
SortUtil.swap(queue,j,k); ?_B'#,tI
k = j; Q@!XVQx4
} dT{GB!jz
} 1k]L,CX
private void fixUp(int k) { ~d3|zlh
while (k > 1) { cw,|,uXq 6
int j = k >> 1; ]K'OH&
if (queue[j]>queue[k]) 0RjFa;j
break; o!lKP>
SortUtil.swap(queue,j,k); AyNpY_B0c
k = j; 6!HYx
} -,+~W#n
} }5;/!P_A
Ng2Z7k
} XmP,3KG2{S
h1)ny1;
} -zUBK
g~2=he\C
SortUtil： CkRilS<
S5:&_&R8[
package org.rut.util.algorithm; ($Op*bR
1#*^+A E
import org.rut.util.algorithm.support.BubbleSort; B@@tKn_CQ
import org.rut.util.algorithm.support.HeapSort; =te4p@
import org.rut.util.algorithm.support.ImprovedMergeSort; di(H-=9G62
import org.rut.util.algorithm.support.ImprovedQuickSort; r0@s3/
import org.rut.util.algorithm.support.InsertSort; xSqr=^
import org.rut.util.algorithm.support.MergeSort; *&tTiv{^
import org.rut.util.algorithm.support.QuickSort; a)*(**e$*i
import org.rut.util.algorithm.support.SelectionSort; iaJLIrl
import org.rut.util.algorithm.support.ShellSort; E5#ff5
\<hHZS
/** +4p=a [
* @author treeroot ,|GjrT{vf
* @since 2006-2-2 4s9.")G
* @version 1.0 A)gSOC{3F)
*/ .mNw^>:cq
public class SortUtil { oVr:ZwkG3
public final static int INSERT = 1; ;<*USS6X
public final static int BUBBLE = 2; III:jhh
public final static int SELECTION = 3; ">M&/}4
public final static int SHELL = 4; 3ZN\F
public final static int QUICK = 5; ]9~Il#
public final static int IMPROVED_QUICK = 6; P+y XC^ ,
public final static int MERGE = 7; \mTi@T!&
public final static int IMPROVED_MERGE = 8; 7|yEf
public final static int HEAP = 9; BnfuI
V(XZ7<& {
public static void sort(int[] data) { ^G 'n z
sort(data, IMPROVED_QUICK); *8+HQ[[#
} "bB0$>0,
private static String[] name={ %QQ 2u$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >4q6
}; `EfFyhG$
u9(42jj[$U
private static Sort[] impl=new Sort[]{ VT-%o7%N
new InsertSort(), ,c0t#KgQ.
new BubbleSort(), XwfR/4
new SelectionSort(), ?p/}eRgi
new ShellSort(), A^$xE6t
new QuickSort(), K2\)9
new ImprovedQuickSort(), ^(Z%,j3O
new MergeSort(), yJ`{\7Uqg
new ImprovedMergeSort(), y>:U&P^
new HeapSort() 7=NKbv]
}; %iME[| u&
:yE0DS<_
public static String toString(int algorithm){ &*E! %57
return name[algorithm-1]; L7nG5i
} (>Nwd^
E!.&y4
public static void sort(int[] data, int algorithm) { db=S*LUbl
impl[algorithm-1].sort(data); i`Qa7
} 9~$E+m(
;q5|If
public static interface Sort { H|7XfM
public void sort(int[] data); *_d N9
} x4MTE?hT
W8Wjq DQ
public static void swap(int[] data, int i, int j) { *>`6{0,9
int temp = data; {;th~[
data = data[j]; z,hBtq:-$
data[j] = temp; DUH DFG
} !G6h~`[
} l@1=./L?