[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; e/~<\
} wA+4:CF@
int i1=l; VFp)`+8
int i2=mid+1; )n61IqrW
for(int cur=l;cur<=r;cur++){ fH{$LjH(
if(i1==mid+1) xo3)dsX
data[cur]=temp[i2++]; X7!A(q+h
else if(i2>r) *VAi!3Rx;
data[cur]=temp[i1++]; "@bk$o=
else if(temp[i1] data[cur]=temp[i1++]; b<MMli
else os+wTUR^
data[cur]=temp[i2++]; dKG<"
} j>=".^J
} b8Ad*f\
`l@t3/
} h.%Qn vL
vYun^(_-
改进后的归并排序: m#(x D~V
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package org.rut.util.algorithm.support; o{,(`o.1O
438>)=
import org.rut.util.algorithm.SortUtil; _e^V\O>
C'"6@-~
/** 5{=MUU=
* @author treeroot gU$3Y#R
* @since 2006-2-2 qt)mUq;>
* @version 1.0 sMo%Ayes
*/ Wsz9X;
public class ImprovedMergeSort implements SortUtil.Sort { rJ*WxOoS{
C!A_PQ2y
private static final int THRESHOLD = 10; 6!V* :.(
jF0BWPL
/* -Euy5Y
* (non-Javadoc) +4RaN`I
* <AXYqH7%A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v:ZD}Q_
*/ Lg53 Ms%
public void sort(int[] data) { <0MUn#7'
int[] temp=new int[data.length]; Kn]WXc|("
mergeSort(data,temp,0,data.length-1); hj[g2S%X
} }e6:&`a xD
l0,O4k2'
private void mergeSort(int[] data, int[] temp, int l, int r) { Z ISd0hV
int i, j, k; ]5L3[A4Vu
int mid = (l + r) / 2; ;#Nci%<J\
if (l == r) =1uI >[aN
return; Np)!23 "
if ((mid - l) >= THRESHOLD) {RO=4ba{J
mergeSort(data, temp, l, mid); &}?e:PEy
else nhxl#
insertSort(data, l, mid - l + 1); tt91)^GdYa
if ((r - mid) > THRESHOLD) od|.E$B
mergeSort(data, temp, mid + 1, r); vDL/PXNC
else Q?q m~wD
insertSort(data, mid + 1, r - mid); m]vr|:{6/
Sy~Mh]{E
for (i = l; i <= mid; i++) { IT"jtV
temp = data; EZFWxR/
} YDL)F<Y
for (j = 1; j <= r - mid; j++) { [O'p&j@
temp[r - j + 1] = data[j + mid]; Melc-[
} r3)t5P*_
int a = temp[l]; U3QnWPt}>
int b = temp[r]; O*7~t17
for (i = l, j = r, k = l; k <= r; k++) { ;RYKqUE
if (a < b) { C$;~=
data[k] = temp[i++]; EtG)2)
a = temp; 1gr jK.x
} else { gr7_oJ:R
data[k] = temp[j--]; &0TheY;srf
b = temp[j]; K!mgh7Dx
} ' ga2C\)
} 5sUnEHN
} =Ch#pLmH
$<#sCrNX
/** }2{#=Elh
* @param data XUHY.M
* @param l _Fjv.VQ,
* @param i >aK&T"
*/ Q.yoxq
private void insertSort(int[] data, int start, int len) { e%\KI\u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AJ}Q,E
} ~>|U%3}]
} "/=xu|
} WBdb[N6\
} K}@:>;*9
pcG q
堆排序： l+,rc*-j0
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package org.rut.util.algorithm.support; h:wD &Fh8
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import org.rut.util.algorithm.SortUtil; )*B.y|b#
r+crE %-
/** UK/k?0
* @author treeroot C09@2M'
* @since 2006-2-2 5=\b+<pE
* @version 1.0 R!ij CF\
*/ |V5H(2/nk
public class HeapSort implements SortUtil.Sort{ aDESO5
V7<} ;Lzm
/* (non-Javadoc) ,q1RJiR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FE.:h'^h
*/ ZhU2z*qN#
public void sort(int[] data) { }^t?v*kcA
MaxHeap h=new MaxHeap(); jw)t"S/E
h.init(data); Q]C1m<x
for(int i=0;i h.remove(); l0f6Lxfz
System.arraycopy(h.queue,1,data,0,data.length); $I%]jAh6
} .*{LPfD|
YDJc@*D
private static class MaxHeap{ !% Md9Mu!o
pe8MG(V
void init(int[] data){ GzX@Av$
this.queue=new int[data.length+1]; :1Ay_b_J
for(int i=0;i queue[++size]=data; z!tHn#
fixUp(size); (msJ:SG
} "A7tb39*
} tQ"PCm
P_}$|zj7
private int size=0; xfilxd
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private int[] queue; G9jtL$}E<
dJk.J9Z
public int get() { ^B<jMt
return queue[1]; :hr%iu
} \VW.>@s~
IlY,V
public void remove() { f-PDgs
SortUtil.swap(queue,1,size--); q;+qIV&.:
fixDown(1); };|'8'5
} 'yl`0,3wV
file://fixdown iVA_a8}
private void fixDown(int k) { )57OZ
int j; Z"A:^jZ<s
while ((j = k << 1) <= size) { /}V9*mD2
if (j < size %26amp;%26amp; queue[j] j++; )<+Z,6
if (queue[k]>queue[j]) file://不用交换 r(RJ&\ !
break; |oX l+&u
SortUtil.swap(queue,j,k); qzq>C"z\Y$
k = j; 0@2%pIq\
} r*$KF!-dg
} =^6]N~*,D
private void fixUp(int k) { M C>{I3
while (k > 1) { L_/.b%0)
int j = k >> 1; F4*f_lP
if (queue[j]>queue[k]) l-5-Tf&j
break; Yk }zN_v
SortUtil.swap(queue,j,k); I;=}@]9
k = j; p0b&CrALx
} 7:]I@Gc'
} u4%-e)$X
-)w/nq
} avdi9!J2
rLp0VKPe
} B4|3@X0(
- iU7'
SortUtil： )V3G~p=0
kIQMIL0+
package org.rut.util.algorithm; Xf:-K(%e
bBGLf)fsTG
import org.rut.util.algorithm.support.BubbleSort; WKP=[o^
import org.rut.util.algorithm.support.HeapSort; iidK}<o
import org.rut.util.algorithm.support.ImprovedMergeSort; =*t)@bn
import org.rut.util.algorithm.support.ImprovedQuickSort; rN OwB2e
import org.rut.util.algorithm.support.InsertSort; =5+:<e,&
import org.rut.util.algorithm.support.MergeSort; M}HGFN
import org.rut.util.algorithm.support.QuickSort; xHHG| u
import org.rut.util.algorithm.support.SelectionSort; U4%P0}q/
import org.rut.util.algorithm.support.ShellSort; o;}o"-s
By%aTuV$
/** LFtnSB8
* @author treeroot [<6ez;2q'
* @since 2006-2-2 ~Xa >;
* @version 1.0 "@.hz@>
*/ r"^P>8
public class SortUtil { i9$ -lk
public final static int INSERT = 1; B\BP:;"
public final static int BUBBLE = 2; yYF%U7N/n
public final static int SELECTION = 3; I~EJctOG
public final static int SHELL = 4; s(-$|f+s
public final static int QUICK = 5; x-cg df
public final static int IMPROVED_QUICK = 6; L_Om<LO2
public final static int MERGE = 7; =ayl~"bW
public final static int IMPROVED_MERGE = 8; r-=#C1eY&
public final static int HEAP = 9; g+U6E6}1
UkeX">
public static void sort(int[] data) { A+>+XA'
sort(data, IMPROVED_QUICK); pLNv\M+
} FK>8(M/
private static String[] name={ 7N 7W0Ky
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 90(JP-
}; z" 4$mh
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private static Sort[] impl=new Sort[]{ -:Yx1Y3 [
new InsertSort(), y3kXfSe
new BubbleSort(), 0rooL<~fa
new SelectionSort(), _>0I9.[5
new ShellSort(), KftZ^mk+p
new QuickSort(), uK1DC i
new ImprovedQuickSort(), .*i.Z
new MergeSort(), l.El3+
new ImprovedMergeSort(), (6!W8x7
new HeapSort() /GqW1tcO
}; >,7-cm=.
,x&T8o/a
public static String toString(int algorithm){ _I+QInD;)
return name[algorithm-1]; [Q6PFdQ_JT
} VI/77
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public static void sort(int[] data, int algorithm) { RX\%R
impl[algorithm-1].sort(data); Igrr"NuDZ
} 2XNO*zbve
a/^ojn
public static interface Sort { 3P N<J
public void sort(int[] data); %xPJJ$P
} 7\HjQ7__
:;HJ3V;
public static void swap(int[] data, int i, int j) { t,Ss3
int temp = data; `B-jwVrN(
data = data[j]; Z7J8%ywQ
data[j] = temp; K+p7yZJ
} f@rR2xZoQ
} }Ox5,S}ra