[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; /<}m? k\
} xA1hfe.9
int i1=l; X*39c b(b
int i2=mid+1; ang~<
for(int cur=l;cur<=r;cur++){ /X(t1+
if(i1==mid+1) j =WST
data[cur]=temp[i2++]; Fpa;^F
else if(i2>r) jJY"{foWV
data[cur]=temp[i1++]; +~roU{& o
else if(temp[i1] data[cur]=temp[i1++]; *R3f{/DK
else I8/DR z$A
data[cur]=temp[i2++]; iz?tu: \v&
} :GW&O /Yo
} Nwt" \3
2eC(Ijq[a
} *l;B\=KR
c`WHNky%j
改进后的归并排序: 8&~~j7p,
X 9%'|(tL
package org.rut.util.algorithm.support; ~r$jza~o(
+$(2:S*r
import org.rut.util.algorithm.SortUtil; <Ib[82PU
_~tEw.fM5
/** \eb|eN0i
* @author treeroot E}_[QEY;Y
* @since 2006-2-2 4jBC9b}O
* @version 1.0 QgD g}\P
*/ HXYRH
public class ImprovedMergeSort implements SortUtil.Sort { !$Tw^$n
|),'9
private static final int THRESHOLD = 10; kbfC|5S
~$f;U
/* !\#_Jw%y
* (non-Javadoc) C?=P
* RUUk f({(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~+bGN
*/ @]c(V%x
public void sort(int[] data) { P"?FnTbv[
int[] temp=new int[data.length]; e)IpPTj#
mergeSort(data,temp,0,data.length-1); f%)zg(YlO
} ]I.n\2R]om
iy\nio`
private void mergeSort(int[] data, int[] temp, int l, int r) { 6^n0[7
int i, j, k; m6yIR6H
int mid = (l + r) / 2; L0]_hxE?
if (l == r) }Jh: 8BNuP
return; GK}'R=
if ((mid - l) >= THRESHOLD) P;8>5;U4-
mergeSort(data, temp, l, mid); T<joRR
else r-IVb&uFb
insertSort(data, l, mid - l + 1); <{:
if ((r - mid) > THRESHOLD) 9Sq%s&
mergeSort(data, temp, mid + 1, r); Lru-u:
else %77p5ctW
insertSort(data, mid + 1, r - mid); 1?Aga,~k:a
p|/j4@-h
for (i = l; i <= mid; i++) { $W42vjr4
temp = data; qxMnp}O
} #W2[
for (j = 1; j <= r - mid; j++) { LsGiu9~S
temp[r - j + 1] = data[j + mid]; LFp]7Dq
} ~;OYtz
int a = temp[l]; /_-;zL
int b = temp[r]; rf9_eP
for (i = l, j = r, k = l; k <= r; k++) { HFQR ;9]
if (a < b) { daAyx-
data[k] = temp[i++]; "$5\,
a = temp; }T0K^Oe+eS
} else { xg{HQQ|TC
data[k] = temp[j--]; >(tn"2
b = temp[j]; a)! g7u
} tNmy& nsA
} |"$uRV=qm
} rt+..t\
%im#ww L%
/** +>g`m)?p
* @param data I#FF*@oeM
* @param l MYnH2w]
* @param i Er:?M_ev
*/ {sv{847V
private void insertSort(int[] data, int start, int len) { dd7 =)XT+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B7-RU<n
} qq0?e0H
} h#Ce_,o
} -#A:`/22
} 6=PiVwI
8xI`jE"1
堆排序： g.#+z'l
jV7&Y.$zF]
package org.rut.util.algorithm.support; JK~ m(oQ
D\T!4q'Q
import org.rut.util.algorithm.SortUtil; U06o;s(
8h?X!2Nq
/** ~k4W<
* @author treeroot ij&p4
* @since 2006-2-2 N^elVu4 K
* @version 1.0 }Pg' vJW
*/ LEc8NQs
public class HeapSort implements SortUtil.Sort{ 1 2]fQkp
0B0G2t&hr
/* (non-Javadoc) ":d*dl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e.6Dl_
*/ O5 7jz= r
public void sort(int[] data) { H$-$2?5
MaxHeap h=new MaxHeap(); It 2UfW
h.init(data); TIRHT`"i
for(int i=0;i h.remove(); 2Yyb#Ow
System.arraycopy(h.queue,1,data,0,data.length); +|nsu4t,<
} .Y/-8H-3v
-Q`Cq|s
private static class MaxHeap{ 6hbEO-(
'}O!2W&Y]%
void init(int[] data){ NFoZ4R1gy
this.queue=new int[data.length+1]; owMuT^x?
for(int i=0;i queue[++size]=data; P6OM)>C
fixUp(size); KHJ=$5r)
} 712=rUI%!
} _XN~@5elrC
w?ai,Pw
private int size=0; FYeEG
t61'LCEis
private int[] queue; gLCz]D.'
^X;JT=r
public int get() { Z)v)\l9d
return queue[1]; \2eFpy(
} chwh0J;
mSj76'L#
public void remove() { 2wOy}:
SortUtil.swap(queue,1,size--); #HcI4j:s!
fixDown(1); ArdJ."
} 7+]F^ 6
file://fixdown @5*xw1B
private void fixDown(int k) { bG1 ofsU
int j; 3z$\&& BR
while ((j = k << 1) <= size) { <d<RK@2-
if (j < size %26amp;%26amp; queue[j] j++; AuM:2N2
if (queue[k]>queue[j]) file://不用交换 1'OD3~[R
break; _9qEZV
SortUtil.swap(queue,j,k); W)
k = j; 'v`~(9'Rcj
} Kk56/(_S
} a:xgjUt&5
private void fixUp(int k) { V?WMj $l<
while (k > 1) { c; d"XiA
int j = k >> 1; n%8#?GC`
if (queue[j]>queue[k]) z+2u-jG
break; nvwDx*[qN
SortUtil.swap(queue,j,k); +"G(
k = j; Fj48quW1\P
} zVn*!c
} iPJ9Gh7
\c'%4Ao
} ="=#5C
5D>BV*"
} /!o1l\i=5
|4LQ\'N&
SortUtil： 8:BQHYeJK
Ld'EABM
package org.rut.util.algorithm; xQ_:]\EZ
@b>YkJDk
import org.rut.util.algorithm.support.BubbleSort; nN!vgn j
import org.rut.util.algorithm.support.HeapSort; -!JlM@
import org.rut.util.algorithm.support.ImprovedMergeSort; .Lp Nm'=R
import org.rut.util.algorithm.support.ImprovedQuickSort; RbyF#[}
import org.rut.util.algorithm.support.InsertSort; `=PB2'
import org.rut.util.algorithm.support.MergeSort; `mWQWx$V!
import org.rut.util.algorithm.support.QuickSort; ejDCmD
import org.rut.util.algorithm.support.SelectionSort; ~&vA_/M
import org.rut.util.algorithm.support.ShellSort; ,OFq'}q
/ N*HE
/** &P{o{
* @author treeroot ]Sk#a-^~
* @since 2006-2-2 I>(;bNgNE
* @version 1.0 19pND m2H1
*/ GC,vQ\
public class SortUtil { B=r]_&u-u
public final static int INSERT = 1; {.0X[uAf
public final static int BUBBLE = 2; 1,!\7@<CT
public final static int SELECTION = 3; 3S|;yOl#X
public final static int SHELL = 4; KGwL09)
public final static int QUICK = 5; _N#3lU?
public final static int IMPROVED_QUICK = 6; IMw)X0z
public final static int MERGE = 7; P\0%nyOG(%
public final static int IMPROVED_MERGE = 8; 9nAK6$/
public final static int HEAP = 9; 2*DS_=6o
V>j`
public static void sort(int[] data) { v7u}nx
sort(data, IMPROVED_QUICK); mqc Z3lsv
} (mr`?LI}
private static String[] name={ [|O6n"'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &{{f|o=u.
}; BjJ gQ`X
}ucg!i3C
private static Sort[] impl=new Sort[]{ 2l4i-;
new InsertSort(), Y]0y -H
new BubbleSort(), qinQ5t
new SelectionSort(), yj9gN}+
new ShellSort(), {!bJ.O l
new QuickSort(), T0)y5
new ImprovedQuickSort(), UimZ/\r
new MergeSort(), `3s-\>
new ImprovedMergeSort(), -T6%3>h
new HeapSort() =W^L8!BE'
}; >~InO^R`5
7ij=%if2@k
public static String toString(int algorithm){ 5E(P,!-.
return name[algorithm-1]; -^"?a]B
} aJ@qB9(ZBe
LA0x6E+I
public static void sort(int[] data, int algorithm) { a{.n(M
impl[algorithm-1].sort(data); EmoU7iy
} )fr\V."
m,q<R1
public static interface Sort { x"T^>Q
public void sort(int[] data); +:Zi(SuS]
} ^:j:;\;
7[ji,.7
public static void swap(int[] data, int i, int j) { ]gk1h=Y~h
int temp = data; Lj,%pzJ
data = data[j]; >GRuS\B
data[j] = temp; oI/ThM`=q
} F9hWB17u
} vBXr[XoC