[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^akA
} Fr-Vq=j&
int i1=l; XT\2
int i2=mid+1; ZFtJoGaR
for(int cur=l;cur<=r;cur++){ 9rIv-&7'm
if(i1==mid+1) Q9c*I,Oj
data[cur]=temp[i2++]; zDBm^ s
else if(i2>r) )LsUO#%DO
data[cur]=temp[i1++]; 1+[,eq
else if(temp[i1] data[cur]=temp[i1++]; l3+G]C&<
else .$1S-+(kV
data[cur]=temp[i2++]; {P3gMv;
} !}5+hj!6
} Y-,S_59
2Sk hBb=d
} (w`_{%T
i6S["\h>
改进后的归并排序: pU<GI@gU
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package org.rut.util.algorithm.support; ^)o]hE|
{{)pb>E
import org.rut.util.algorithm.SortUtil; $h}w:AV:
)(rr1^Xer
/** eep/96G ?
* @author treeroot ti3S'K0t
* @since 2006-2-2 q^uCZnkb=
* @version 1.0 i ~)V>x
*/ -0I&dG-
public class ImprovedMergeSort implements SortUtil.Sort { jAovzZ6BL
ftQ;$@
private static final int THRESHOLD = 10; 1r5Z$3t\
/`t}5U>S_
/* xTqP`ljX
* (non-Javadoc) ;Zc0imYL
* #Zi6N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "Z~@"JLb%
*/ 9{rE7OX*A
public void sort(int[] data) { QIdml*Np?H
int[] temp=new int[data.length]; fF2]7:
mergeSort(data,temp,0,data.length-1); ,zdK%V}
} U lCw{:#F
r9<#R=r)}J
private void mergeSort(int[] data, int[] temp, int l, int r) { Rl_1g`84
int i, j, k; mE'HRv
int mid = (l + r) / 2; ~mZ[@Z
if (l == r) wod(P73?
return; yr*~?\
if ((mid - l) >= THRESHOLD) 1;!dTh
mergeSort(data, temp, l, mid); &i6JBZ#~,
else [h>A<O
insertSort(data, l, mid - l + 1); bZZ_yc
if ((r - mid) > THRESHOLD) '}OAl
mergeSort(data, temp, mid + 1, r); Z`Jt6QgW
else VMS3Q)Ul
insertSort(data, mid + 1, r - mid); |x=(}g
I]cZcx,<q
for (i = l; i <= mid; i++) { MlLM $Y-@
temp = data; rT[b ^l}
} ? :A%$T
for (j = 1; j <= r - mid; j++) { T hVq5
temp[r - j + 1] = data[j + mid]; 6KE64: \;
} 2_Zn?#G8dl
int a = temp[l]; j'Gezx^.<e
int b = temp[r]; 0LTsWCUQ6e
for (i = l, j = r, k = l; k <= r; k++) { ^* CKx
if (a < b) { 0d89>UB-8q
data[k] = temp[i++]; w}M)]kY
a = temp; HIvSh6|0p
} else { TxKNDu
data[k] = temp[j--]; ^`RMf5i1m
b = temp[j]; q4vHsy36
} D+w?
} J/rF4=j%xy
} YpG6p0 nd
:3b\pEO9\
/** _^$F^}{&
* @param data q AsTiT6r
* @param l Z4{N|h?
* @param i cet|k!
*/ 0}e&ONDQ
private void insertSort(int[] data, int start, int len) { jS|jPk|I.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4KW_#d`t
} :#UA!|nV
} KB{/L5
} UI wTf2B
} &$h#9
Bi0&F1ZC!
堆排序： LRdV_O1e6M
1R]h>'
package org.rut.util.algorithm.support; q1A0-W#4
"rrE_
import org.rut.util.algorithm.SortUtil; iE]^6i
@y|JIBBRc
/** :Yi 4Ia
* @author treeroot "msPH<D
* @since 2006-2-2 w-Q=oEt
* @version 1.0 R78P](1\>
*/ !OOOc
public class HeapSort implements SortUtil.Sort{ /~g.j1g
d:hX3
/* (non-Javadoc) A8ClkLC;I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J|8 u
*/ g{hbq[>X]
public void sort(int[] data) { 1V]j8
MaxHeap h=new MaxHeap(); , lBHA+@
h.init(data); 99[v/L>F
for(int i=0;i h.remove(); jtwe9
System.arraycopy(h.queue,1,data,0,data.length); =[)2DJC
} <}%gZ:Z6g
vfh\X1Ui}
private static class MaxHeap{ '=UsN_@
n,p \~Tu,
void init(int[] data){ U.ew6`'Te
this.queue=new int[data.length+1]; hgdr\ F
for(int i=0;i queue[++size]=data; ?~;q r
fixUp(size); LEAU3doK;
} !6J+#
} :ZXaJ!
|+1k7S,
private int size=0; irn }.e
-)e(Qt#ewl
private int[] queue; %,udZyO3uR
}jL4F$wC
public int get() { &Z+.FTo
return queue[1]; NDG?Xs [2
} "ZG2olOqLI
[t]q#+Zs
public void remove() { n%{oFTLCo
SortUtil.swap(queue,1,size--); Z}>+!Z
fixDown(1); )2bbG4:N
} >UV=k :Q
file://fixdown B\>3[_n
private void fixDown(int k) { _9z+xl
int j; vARZwIu^D
while ((j = k << 1) <= size) { :]`JcJ
if (j < size %26amp;%26amp; queue[j] j++; %z["TVH
if (queue[k]>queue[j]) file://不用交换 eGI&4JgJ.
break; 'uLYah
SortUtil.swap(queue,j,k); ZC&4uNUr
k = j; Bs<LJzS{V
} e!4Kl:
} 1tH#QZIT
private void fixUp(int k) { W\z<pP
while (k > 1) { uJJP<mDgA
int j = k >> 1; DjiWg(X
if (queue[j]>queue[k]) =fI0q7]ndz
break; !6*4^$i#o
SortUtil.swap(queue,j,k); q/3co86c
k = j; 7zu3o
} O9:J ^g
} A~'p~@L
p5bM/{DP;K
} z2SR/[I?
_/F}y[B7d
} V V Aw y6
9<*<-x{A17
SortUtil： 2*0n#" L
'V*8'?
package org.rut.util.algorithm; ~tqNxlA
62>/0_m5
import org.rut.util.algorithm.support.BubbleSort; w6'8L s
import org.rut.util.algorithm.support.HeapSort; o6S`7uwJ*/
import org.rut.util.algorithm.support.ImprovedMergeSort; kk/vgte-)e
import org.rut.util.algorithm.support.ImprovedQuickSort; +/Vzw
import org.rut.util.algorithm.support.InsertSort; BWsD~Ft
import org.rut.util.algorithm.support.MergeSort; bpfSe
import org.rut.util.algorithm.support.QuickSort; @C5%`{\
import org.rut.util.algorithm.support.SelectionSort; ,jMV #H[
import org.rut.util.algorithm.support.ShellSort; g)iw.M2
zfUkHL6
/** #M8>)oc
* @author treeroot Jl89}Sf
* @since 2006-2-2 &3Mps[u:h
* @version 1.0 &sS]h|2Z5
*/ Y\{lQMCy
public class SortUtil { Wr.~Ns<
public final static int INSERT = 1; rXnG"A
public final static int BUBBLE = 2; GC~N$!*
public final static int SELECTION = 3; +Z%8X!Q
public final static int SHELL = 4; tOw[
public final static int QUICK = 5; b/eo]Id]
public final static int IMPROVED_QUICK = 6; avH3{V
public final static int MERGE = 7; t($z+C<
public final static int IMPROVED_MERGE = 8; 6bt{j
public final static int HEAP = 9; 9;EY3[N
SwmX_F#_
public static void sort(int[] data) { A>}]=Ii/
sort(data, IMPROVED_QUICK); hFt~7R
} IV$2`)[A&X
private static String[] name={ axd9b,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CV6W)B%Se
}; >Y&o2zJy
Re'Ek
private static Sort[] impl=new Sort[]{ '>|5
new InsertSort(), ZQrgYeQl"
new BubbleSort(), O}"fhMk
new SelectionSort(), 4(\7Or(''
new ShellSort(), ?[ vC?P
new QuickSort(), *wJ'Z4_5F
new ImprovedQuickSort(), ij1g2^],4
new MergeSort(), |}K7Q
new ImprovedMergeSort(), `H\NJ,
new HeapSort() \fD[Ej
}; Jf8AKj3
tD}HL_
public static String toString(int algorithm){ {,i='!WIm
return name[algorithm-1]; ^->vUf7PX
} ?C9>bKo*2H
TZk.h8
public static void sort(int[] data, int algorithm) { lpeo^Y}N
impl[algorithm-1].sort(data); Qmn'G4#@E
} E{6X-C[)v
=u]FKY
public static interface Sort { eFCXjM
public void sort(int[] data); -q/FxESp
} _yVF+\kQ
+l_$}UN
public static void swap(int[] data, int i, int j) { sR*JU%
int temp = data; {1`n^j(>
data = data[j]; .[#bOp*
data[j] = temp; &M^FA=J\
} f*~z|
} dCM*4B<