[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; ]b.@i&M
} #|GP]`YT
int i1=l; |Ag~k? QC
int i2=mid+1; 7sC$hm]
for(int cur=l;cur<=r;cur++){ O=MO M
if(i1==mid+1) be$wGO=Ts
data[cur]=temp[i2++]; E3_e~yu&
else if(i2>r) L<J';#BD
data[cur]=temp[i1++]; ]H[RY&GY
else if(temp[i1] data[cur]=temp[i1++]; e8a_)TU?
else Dvo.yn|kB
data[cur]=temp[i2++]; P_z3TK
} 1V+a;-?
} v~?d7p{
z\oq b)a
} tcwE.>5O
%^p1ax
改进后的归并排序: 9|D!&=8
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package org.rut.util.algorithm.support; ?<#6=
j7xoe9;TxI
import org.rut.util.algorithm.SortUtil; ch 4z{7
{Lk~O)E
/** $s/N;E!t
* @author treeroot 9-Ikd>9
* @since 2006-2-2 tt{,f1v0t
* @version 1.0 .2C}8GGC'
*/ gvr"F
public class ImprovedMergeSort implements SortUtil.Sort { +%7yJmMw
AGx]srl
private static final int THRESHOLD = 10; u!k\W{
S3MMyS8
/* G{knO?BK
* (non-Javadoc) KY!
* sI@m"A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ib*l{cxN
*/ s!9.o_k
public void sort(int[] data) { 5MQD:K2
int[] temp=new int[data.length]; !\}Dxt
mergeSort(data,temp,0,data.length-1); U!XC-RA3 _
} SWz+.W{KQ"
NC>rZS]
private void mergeSort(int[] data, int[] temp, int l, int r) { X<x"\Yk
int i, j, k; @r%[e1.
int mid = (l + r) / 2; o`+6E q0w
if (l == r) %q;3bfq@N
return; R."<he ;
if ((mid - l) >= THRESHOLD) {[jcT>.3j
mergeSort(data, temp, l, mid); 5H6m{ng
else 0F1 a
insertSort(data, l, mid - l + 1); w+=>b
if ((r - mid) > THRESHOLD) 54JZEc
mergeSort(data, temp, mid + 1, r); lV?rC z
else )xiic3F
insertSort(data, mid + 1, r - mid); zQ(li9
AZ(["kh[
for (i = l; i <= mid; i++) { |<\o%89AM
temp = data; 7Z0 )k9*
} qy`@\)S/5
for (j = 1; j <= r - mid; j++) { Ih;6(5z
temp[r - j + 1] = data[j + mid]; `ihlKFX
} `pn]jpW9
int a = temp[l]; TKx.`Cf m
int b = temp[r]; 7ib~04
for (i = l, j = r, k = l; k <= r; k++) { _SY<(2s]B
if (a < b) { mv/'H^"[_
data[k] = temp[i++]; `4'v)!?
a = temp; rqxoqcZ
} else { mEa\0oPGB
data[k] = temp[j--]; k_r12Bu
b = temp[j]; pD9*WKEf*
} KqP!={>"
} xlp^XT6#
} @N7X(@O
MOP/q4j[
/** >~){KV1~
* @param data R56:}<Y,
* @param l >)R7*^m{'
* @param i IiHl"2+/
*/ 3Nd&*QSV
private void insertSort(int[] data, int start, int len) { )-xx$0mL-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EFW'D=&h8
} <ap%+(!I
} i~@e}=
} y1p^ &9U
} i;s&;_0{
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堆排序： 4`o_r%
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package org.rut.util.algorithm.support; WNrgqyM
a9j f7r1
import org.rut.util.algorithm.SortUtil; w=vK{h#8
?[hIv6c
/** +;c)GNQ)6:
* @author treeroot H{VVxj
* @since 2006-2-2 .}&bE1
* @version 1.0 w= |).qQ]
*/ hD/bgquT
public class HeapSort implements SortUtil.Sort{ -%E+Yl{v
y))d[1E
/* (non-Javadoc) 0UB)FK,9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %"r3{Hs
*/ z4!TK ps
public void sort(int[] data) { ?x7zYE,6
MaxHeap h=new MaxHeap(); @]uvpI!h
h.init(data); gXZC%S
for(int i=0;i h.remove(); o9(:m
System.arraycopy(h.queue,1,data,0,data.length); '`p#%I@
} _Jx.?8
#f0J.)M
private static class MaxHeap{ bX6eNk-L
:aI[ lZ
void init(int[] data){ 1Jg&L~Ws"
this.queue=new int[data.length+1]; }b)7gd=
for(int i=0;i queue[++size]=data; &m&Z^CA
fixUp(size); ^#B`GV
} ?){V7<'?y
} W&#Ps6)8
.:A9*,
private int size=0; 8C7$8x]mM
-`sK?*[{J
private int[] queue; :V*c9,>ZO
wa-#C,R\_#
public int get() { sgu#`@o
return queue[1]; :*u .=^
} 9gVu:o1/
,#W>E,UU
public void remove() { pyhC%EZU
SortUtil.swap(queue,1,size--); L'B= =#
fixDown(1); `qnSq(tNq
} JnQ5r>!>3
file://fixdown _LU]5$\b
private void fixDown(int k) { ~,3+]ts='\
int j; o *)>aw
while ((j = k << 1) <= size) { `n7*6l<k~4
if (j < size %26amp;%26amp; queue[j] j++; Z`y%#B6x.
if (queue[k]>queue[j]) file://不用交换 Y> ElE-
break; !LB#K?I
SortUtil.swap(queue,j,k); Opx"'HC@G
k = j; OPOL-2<wiy
} bHZXMUewC
} nb::,
private void fixUp(int k) { .Y|5i^i9{
while (k > 1) { =z`#n}v
int j = k >> 1; M:K5r7Q!yv
if (queue[j]>queue[k]) C ioM!D
break; o|u<tuUW
SortUtil.swap(queue,j,k); K,(37Id'
k = j; D]X&Va
} 1(t{)Z<
} -i*{8t
[hC-} 9
} =kFZ2/P2t(
O(q1R#n-}+
} i E p{
uvC ![j^~
SortUtil： 9jW/"
M9so3L<N0
package org.rut.util.algorithm; {WJ9!pA!lk
x.W93e[]H
import org.rut.util.algorithm.support.BubbleSort; ;U$Fz~rJ
import org.rut.util.algorithm.support.HeapSort; s[6y|{&ze
import org.rut.util.algorithm.support.ImprovedMergeSort; v3>jXf
import org.rut.util.algorithm.support.ImprovedQuickSort; 21ng94mC
import org.rut.util.algorithm.support.InsertSort; 0 ~K4vSa
import org.rut.util.algorithm.support.MergeSort; |uL"/cMW7
import org.rut.util.algorithm.support.QuickSort; :+Ti^FF`w
import org.rut.util.algorithm.support.SelectionSort; r0jhIE#
import org.rut.util.algorithm.support.ShellSort; rUgTJx&ds
T7+_/ Qh
/** t$+[(}@+
* @author treeroot Z ,4G'[d
* @since 2006-2-2 Q|T9tc->
* @version 1.0 tA;#yM;
*/ /A$mP)}tz
public class SortUtil { yvN;|R
public final static int INSERT = 1; gLp7<gx6
public final static int BUBBLE = 2; <;)qyP
public final static int SELECTION = 3; )/uu~9SFd
public final static int SHELL = 4; v:.`~h/b
public final static int QUICK = 5; wX?<o
public final static int IMPROVED_QUICK = 6; sUl/9VKl
public final static int MERGE = 7; A_nu:K-
public final static int IMPROVED_MERGE = 8; W<']Q_su
public final static int HEAP = 9; y*K]z
";vP77|m7R
public static void sort(int[] data) { )S~ySiJ<U
sort(data, IMPROVED_QUICK); oW7\T!f
} {Ee[rAVGp
private static String[] name={ lJ y\Ky(*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A\xvzs.d
}; 8<#S:O4kA
oY;=$8y<q
private static Sort[] impl=new Sort[]{ ?-.Qv1hs6p
new InsertSort(), bSbUf%LKt
new BubbleSort(), a[).'$S}'
new SelectionSort(), ^R;Qa#=2
new ShellSort(), 1uz7E
new QuickSort(), EGD&/%aC
new ImprovedQuickSort(), tZ4Zj`x|^
new MergeSort(), Wbra*LNU
new ImprovedMergeSort(), bIs@CDB
new HeapSort() y*6-?@
}; *.g@6IkAQ
%p wpRD@
public static String toString(int algorithm){ \9FWH}|
return name[algorithm-1]; Y\cQ"9
} 8y$c\Eu(mF
xNLvK:@0p
public static void sort(int[] data, int algorithm) { 83~9Xb=!\
impl[algorithm-1].sort(data); O\;R (
} 9pY`_lxa>
-hn~-Sy+
public static interface Sort { ~]Md*F[4*e
public void sort(int[] data); RlW7l1h&
} A~Uqw8n$\
i7 *cpNPO
public static void swap(int[] data, int i, int j) { +0&SXhy%y
int temp = data; 3d_PY,=1
data = data[j]; k2axGq
data[j] = temp; g#Doed.30=
} Z#Q)a;RA
} xWhi>