[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; _;G|3>5u
} IHe?/oUL"b
int i1=l; *GM.2``e
int i2=mid+1; ;vgaFc]
for(int cur=l;cur<=r;cur++){ \B8[UZA.&
if(i1==mid+1) 2!}rHw
data[cur]=temp[i2++]; .IORvP-M&
else if(i2>r) f_> lz
data[cur]=temp[i1++]; eo4v[V&
else if(temp[i1] data[cur]=temp[i1++]; p4lB#
else `AhTER
data[cur]=temp[i2++]; AJt4I W@
} us^J! s7
} c nV2}U/\
NKRH>2,
} $(pVE}J
6/L34VH
改进后的归并排序: <7J\8JR&=
oo!JAv}~
package org.rut.util.algorithm.support; [L>AU; :
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import org.rut.util.algorithm.SortUtil; ?,*KAGg%
ef -PlGn
/** CNyV6jb
* @author treeroot fb|lWEw5h.
* @since 2006-2-2 _U%2J4T2
* @version 1.0 nnMRp7LQ-
*/ ((]Sy,rdk
public class ImprovedMergeSort implements SortUtil.Sort { f15n ~d
rNX]tp{j
private static final int THRESHOLD = 10; e>$E67h<~
5x' ^.$K >
/* . AX6xc6
* (non-Javadoc) F2mW<REg{
* 7By&cdl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !o8(9F
*/ 7.C~ OrGR
public void sort(int[] data) { (/Dr=D{ `
int[] temp=new int[data.length]; SR {KL#NC
mergeSort(data,temp,0,data.length-1); Blv@u?
} -<aN$O
~.8p8\H
private void mergeSort(int[] data, int[] temp, int l, int r) { 1Ozy;;\-9
int i, j, k; + Scw;gO
int mid = (l + r) / 2; ]08 ~"p
if (l == r) :O{ ZZ
return; WB=|Ty~l
if ((mid - l) >= THRESHOLD) .V|o-~c
mergeSort(data, temp, l, mid); *`bAu *
else 4'0rgS
insertSort(data, l, mid - l + 1); EnXTL]=0S
if ((r - mid) > THRESHOLD) X##hSGQM
mergeSort(data, temp, mid + 1, r); *W=R:Bl!
else C2W&*W*
insertSort(data, mid + 1, r - mid); 3X}>_tj
g;G.uF&
for (i = l; i <= mid; i++) { ,$;pLjo6
temp = data; :HDU\|{^
} 2<Q3-|/i
for (j = 1; j <= r - mid; j++) { 0]`%iG|
temp[r - j + 1] = data[j + mid]; Y` tB5P
} x8E!Ko](
int a = temp[l]; ^Euqy,8}
int b = temp[r]; zX ?@[OT
for (i = l, j = r, k = l; k <= r; k++) { ~!TRR.
if (a < b) { SHP_
data[k] = temp[i++]; H6]z98
a = temp; S%k](\7!
} else { 8zk?:?8%{
data[k] = temp[j--]; B&c*KaK;~
b = temp[j]; 44(l1xEN+
} *9xv0hRQ%?
} :sXn*k4v
} W\JwEb9Y
/|2 hW`G
/** 4Rev7Mc
* @param data h;2n2.Q
* @param l A>W8^|l6+-
* @param i p1(<F_Kta
*/ :I^I=A%Pe(
private void insertSort(int[] data, int start, int len) { B]|"ePj-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `f+l\'.s
} e`Vb.E)
} u.L{3gkT
} uO;_T/^u
} T_*R^Ukb5
q3-V_~5^/z
堆排序： H8'_.2vwX
0*}%v:uN9
package org.rut.util.algorithm.support; k874tD
x6={)tj
import org.rut.util.algorithm.SortUtil; !`?*zf
6l-V%3-
/** *T{P^q.s~[
* @author treeroot .YcI .
* @since 2006-2-2 x*2'I
* @version 1.0 !/Wp0E'A
*/ 6Cd% @Q2cr
public class HeapSort implements SortUtil.Sort{ S,~DA3
RkuPMs Hw;
/* (non-Javadoc) U k*HRudt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;OynkZs)
*/ *%wfR7G[B
public void sort(int[] data) { j=~c( B
MaxHeap h=new MaxHeap(); l2LUcI$ x
h.init(data); aL%amL6CX
for(int i=0;i h.remove(); YFY$iN~B,
System.arraycopy(h.queue,1,data,0,data.length); ({_Dg43O'[
} ?E:L6,a
98AX=%8
private static class MaxHeap{ N]6M4j!
szx7CP`<8
void init(int[] data){ W4~:3Sk
this.queue=new int[data.length+1]; Ot#O];3
for(int i=0;i queue[++size]=data; iI(7{$y
fixUp(size); 1"5-doo
} R"`7aa6
} wa*/Am9;~
5??\[C^"}
private int size=0; }- P ='AyL
/?wH1 ,
private int[] queue; u!VAAX
Q-g}{mFS
public int get() { 2po>%Cp
return queue[1]; 1^4z/<ZWm
} nR1QS_@{L
qvH7otA
public void remove() { U*sQYt<?g
SortUtil.swap(queue,1,size--); 9OnH3
fixDown(1); %8a886;2
} ~@wM[}ThP$
file://fixdown g:sn/Zug]
private void fixDown(int k) { 6*n<emP
int j; P:gN"f6
while ((j = k << 1) <= size) { zrg#BXj7
if (j < size %26amp;%26amp; queue[j] j++; _b8?_Zq
if (queue[k]>queue[j]) file://不用交换 5_MqpCL
break; \Gk4J<
SortUtil.swap(queue,j,k); E8=8OX/{Y
k = j; u'BuZF
} :"4Pr/}rT
} "/&_B
private void fixUp(int k) { |*+f N8
while (k > 1) { 2HemPth
int j = k >> 1; ,@1.&!F4it
if (queue[j]>queue[k]) X<<hb
break; D< h+r?
SortUtil.swap(queue,j,k); hS}d vZa
k = j; feH|sz`e
} }Ra'`;D$
} 1k *gbXb
!F_BLHig
} DFKumw>!
)Uv lEG']
} 9svnB@
y.l`NTT]<
SortUtil： ^}gQh#
m6 )sX&
package org.rut.util.algorithm; e /4{pe+,
c3>#.NP_
import org.rut.util.algorithm.support.BubbleSort; B4 cm_YGE
import org.rut.util.algorithm.support.HeapSort; "|6#n34
import org.rut.util.algorithm.support.ImprovedMergeSort; U?}>A5H
import org.rut.util.algorithm.support.ImprovedQuickSort; ^" EsBt
import org.rut.util.algorithm.support.InsertSort; KAucSd`
import org.rut.util.algorithm.support.MergeSort; jJxV)AIY
import org.rut.util.algorithm.support.QuickSort; Gqz<;y
import org.rut.util.algorithm.support.SelectionSort; 8U5L|Ny.q
import org.rut.util.algorithm.support.ShellSort; l#W9J.q(
q-g3!
/** $H9+>Z0(
* @author treeroot b`=\<u8
* @since 2006-2-2 %ifq4'?Z
* @version 1.0 vyt$
*/ *P#okwp
public class SortUtil { wap@q6fz<
public final static int INSERT = 1; f<`is+"
public final static int BUBBLE = 2; py9HUyr5eZ
public final static int SELECTION = 3; 'ow`ej
public final static int SHELL = 4; S|{'.XG
public final static int QUICK = 5; *[-% .=[7
public final static int IMPROVED_QUICK = 6; >>ncq$
public final static int MERGE = 7; lAxbF
public final static int IMPROVED_MERGE = 8; 0 s-IW
public final static int HEAP = 9; nnV(MB4z1
kXmnLxhS/
public static void sort(int[] data) { SOq{`~,4B
sort(data, IMPROVED_QUICK); ~qG`~/7
} uK:?6>H
private static String[] name={ F3aOKV^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a5v}w7vL
}; TfD]`v`]
B}%B4&Ij
private static Sort[] impl=new Sort[]{ rHir> p
new InsertSort(), iG\]
new BubbleSort(), dA`.
new SelectionSort(), ]pZxbs&Vb
new ShellSort(), ^=H. .pr
new QuickSort(), SxHj3,`#C
new ImprovedQuickSort(), {c'2{`px 5
new MergeSort(), CMm:Vea
new ImprovedMergeSort(), kIb)I(n
new HeapSort() NDJIaX:]
}; iBq|]
PhHBmMGL
public static String toString(int algorithm){ = h _>OA
return name[algorithm-1]; {R2gz]v4
} u*I=.
TV~<1vj
public static void sort(int[] data, int algorithm) { MT8BP)C
impl[algorithm-1].sort(data); x-Kq=LFy.
} [Ch)6p
[7Yfv Xp
public static interface Sort { ;\F3~rl
public void sort(int[] data); CnJrJ>l
} t8Sblgq
{Lex((
public static void swap(int[] data, int i, int j) { mG?g
int temp = data; w"Q6'/P
data = data[j]; JMMT886
data[j] = temp; U4J9bp|
} c~@Z
} -'j_JJ