[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; z8Q"%@
} 2D([Z-<i
int i1=l; ~E=\t9r
int i2=mid+1; m]IysyFFK
for(int cur=l;cur<=r;cur++){ (Btv ClZ
if(i1==mid+1) ,fnsE^}.U
data[cur]=temp[i2++]; 4?/7 bc
else if(i2>r) '5};M)w
data[cur]=temp[i1++]; ?z"KnR+?Q
else if(temp[i1] data[cur]=temp[i1++]; V+w u
else X^< >6|)
data[cur]=temp[i2++]; PMKb ]y
} zfjTQMaxh
} =Mhg
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} W>L@j(
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改进后的归并排序: o@dy:AR
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package org.rut.util.algorithm.support; ,w&:_n
u fw cF*
import org.rut.util.algorithm.SortUtil; 64D%_8#m
" OGdE_E
/** viuiqs5[Bi
* @author treeroot =ef1XQ{i*
* @since 2006-2-2 |5xzl
* @version 1.0 ';/84j-3F
*/ *?8RXer
public class ImprovedMergeSort implements SortUtil.Sort { 8Z:Ezg3^
O3!d(dY=_
private static final int THRESHOLD = 10; vF>gU_gz.
k!doIMj
/* 5 R*lVUix
* (non-Javadoc) w &vhWq
* e~Hr(O+;e6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !"! ii$@
*/ L#j|2H|
public void sort(int[] data) { 797X71>
int[] temp=new int[data.length]; 9bEM#Hj
mergeSort(data,temp,0,data.length-1); E&%jeR
} pGGV\zD^
l#6&WWmr
private void mergeSort(int[] data, int[] temp, int l, int r) { ny`(f,)u*
int i, j, k; pAg$oe#
int mid = (l + r) / 2; a`38db(z
if (l == r) H'h#wV`(
return; sPpS~wk*
if ((mid - l) >= THRESHOLD) rBevVc![
mergeSort(data, temp, l, mid); E0`[G]*G
else hwDXm9
insertSort(data, l, mid - l + 1); vfXJYw+6_
if ((r - mid) > THRESHOLD) hrT%XJl
mergeSort(data, temp, mid + 1, r); ~@YQ,\Y
else tE:X,Lt[
insertSort(data, mid + 1, r - mid); H56 ^n<tg
-,/3"}<^78
for (i = l; i <= mid; i++) { S*rO0s:
temp = data; =43d%N
} Tc,$TCF
for (j = 1; j <= r - mid; j++) { o4'Wr
temp[r - j + 1] = data[j + mid]; hBoP=X.~
} kdBV1E+:C
int a = temp[l]; 8;8YA1@w
int b = temp[r]; od(:Y(4
for (i = l, j = r, k = l; k <= r; k++) { *N'hA5.z
if (a < b) { 'g]=.K+@}
data[k] = temp[i++]; 6s5b$x
a = temp; +l.|kkZ?
} else { $vqU|]J`
data[k] = temp[j--]; s@z{dmL
b = temp[j]; 0`Gai2\1@
} NZ)b:~a
} |f3U%2@
} W[GQ[h
77^ "xsa
/** rd|crD3
* @param data yIa[yJq
* @param l 5=m3J!?
* @param i + lP5XY{
*/ \boL`X
private void insertSort(int[] data, int start, int len) { U81;7L8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $^K]&Mft
} Fj,(_^
} h*G#<M
} 1GUqT 9)
} pY,O_ t$
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堆排序： ^A- sS~w
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package org.rut.util.algorithm.support; 2DUr7rM
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import org.rut.util.algorithm.SortUtil; Vj/fAHR`>'
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/** {vLTeIxf.G
* @author treeroot y%2%^wF
* @since 2006-2-2 H/pcXj
* @version 1.0 E3LBPXK
*/ YN4"O>
public class HeapSort implements SortUtil.Sort{ K q/~T7Ru
7TnM4@*f
/* (non-Javadoc) @T5YsX]qb7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tK*%8I\s
*/ kpl~/i`4
public void sort(int[] data) { #>@<n3rq
MaxHeap h=new MaxHeap(); " \`BPN
h.init(data); nZ&T8@m
for(int i=0;i h.remove(); s c5\( b
System.arraycopy(h.queue,1,data,0,data.length); NP$e-" 1
} DakLD~H;
p}96uaC1
private static class MaxHeap{ AS`2=w
zjea4>!A2
void init(int[] data){ ZGA)r0] P`
this.queue=new int[data.length+1]; ^WmGo]<B_
for(int i=0;i queue[++size]=data; .V8/ELr]
fixUp(size); z~BD(FDI
} n?zbUA#
} +{5JDyh0
G(:s-x ig6
private int size=0; f3/SO+Me}
;R/k2^uF
private int[] queue; Sjw2 j#Q
J 5Wz4`'
public int get() { mfu*o0
return queue[1]; |sA4:Aq
} 5ze`IY
rny@n^F
public void remove() { z\e>DdS
SortUtil.swap(queue,1,size--); g&{gD^9)4
fixDown(1); os}b?I*K
} $dlnmNP+
file://fixdown 9BqQ^`bu
private void fixDown(int k) { 17WNJ
int j; _Wm(/ +G_|
while ((j = k << 1) <= size) { TTeAa
if (j < size %26amp;%26amp; queue[j] j++; nu;}S!J
if (queue[k]>queue[j]) file://不用交换 Sg/:n,68
break; nu#aa#ex>
SortUtil.swap(queue,j,k); _L?v6MTj
k = j; 2=igS#h
} J ZVr&KZN
} z0T`5NG@
private void fixUp(int k) { &?KPu?9
while (k > 1) { cYZwWMzp
int j = k >> 1; JVD@I{
if (queue[j]>queue[k]) JN{<oxI
break; ybD{4&ZE
SortUtil.swap(queue,j,k); v(qV\:s}m
k = j; Py|H? ,6=
} P3+)pOE-SI
} &Pmc"9Rl
lAdOC5+JX
} T [T6
hg%@W
} u3Zzu\{
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SortUtil： mA&RN"+V
s,eld@
package org.rut.util.algorithm; d%}crM-KTL
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import org.rut.util.algorithm.support.BubbleSort; 9F2w.(m
import org.rut.util.algorithm.support.HeapSort; qWRNHUd
import org.rut.util.algorithm.support.ImprovedMergeSort; ^tm++
import org.rut.util.algorithm.support.ImprovedQuickSort; fOqS|1rC
import org.rut.util.algorithm.support.InsertSort; Ft3N#!ubl
import org.rut.util.algorithm.support.MergeSort; /Nj:!! AN
import org.rut.util.algorithm.support.QuickSort; p{mxk)A
import org.rut.util.algorithm.support.SelectionSort; >uBV
import org.rut.util.algorithm.support.ShellSort; 5?V?
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/** A2g"=x[1@K
* @author treeroot jOoIF/So
* @since 2006-2-2 |1dEs,z\
* @version 1.0 JLy)}8I
*/ <Dt/Rad
public class SortUtil { TEaD-mY3
public final static int INSERT = 1; GibggOj2Q,
public final static int BUBBLE = 2; `-72>F;T
public final static int SELECTION = 3; &rl]$Mtt
public final static int SHELL = 4; T+AlcOP
public final static int QUICK = 5; p|bc=`TD
public final static int IMPROVED_QUICK = 6; QrNL7{
public final static int MERGE = 7; ; McIxvj
public final static int IMPROVED_MERGE = 8; H6%!v1 u
public final static int HEAP = 9; &xGfkCP.]
}}sRTW
public static void sort(int[] data) { 8!o{W=m^4
sort(data, IMPROVED_QUICK); Vq\..!y
} 5{R#h :
private static String[] name={ P`Hd*xh".j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zCBtD_@
}; 5`{|[J_[
1K? & J2
private static Sort[] impl=new Sort[]{ +!L_E6pyXE
new InsertSort(), 0p:ClM2O
new BubbleSort(), | Q1ubS
new SelectionSort(), s3MMICRT.
new ShellSort(), c{m ;"ZCFS
new QuickSort(), RB lOTQjv
new ImprovedQuickSort(), uhC=
new MergeSort(), -CU7u=*b
new ImprovedMergeSort(), [}9XHhY1O=
new HeapSort() >?G|Yz*kEJ
}; ctc`^#q
&{%S0\K Y
public static String toString(int algorithm){ sl^s9kx;C$
return name[algorithm-1]; 5,0wj0l
} |7S4;
[/+dHW|
public static void sort(int[] data, int algorithm) { 8aZey_Hw;+
impl[algorithm-1].sort(data); @ V7ooo!
} =XacG}_
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public static interface Sort { siss_1J
public void sort(int[] data); {x&jh|f`g
} ^O$[Y9~*
RK~FT/
public static void swap(int[] data, int i, int j) { 3I>S:|=K
int temp = data; 7uv/@(J"$
data = data[j]; SVg@xu+
data[j] = temp; d5sGkR`(
} 4ye`;hXy
} *0&i'0>