[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; h1Y^+A_
} Qp@}v7Due
int i1=l; %U[H`E
int i2=mid+1; 6 {`J I
for(int cur=l;cur<=r;cur++){ ZP:+'\&J
if(i1==mid+1) }Oe4wEYN)
data[cur]=temp[i2++]; >kuu\
else if(i2>r) DLq'V.M:
data[cur]=temp[i1++]; 3#uc+$[
else if(temp[i1] data[cur]=temp[i1++]; 1vh[sKv9%
else G[d]t$f=
data[cur]=temp[i2++]; N7q6pBA"E
} V\c`O
} ubKp P%Z
-LFk7a
} 6/0bis H
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改进后的归并排序: Tj2pEOu
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package org.rut.util.algorithm.support; r.]IGE|
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import org.rut.util.algorithm.SortUtil; j\@&poJ(,
hBDmC_\~
/** O^~nf%
* @author treeroot ]<;y_
* @since 2006-2-2 WQ{^+C9g'1
* @version 1.0 02[*b
*/ )ItW}1[I
public class ImprovedMergeSort implements SortUtil.Sort { ayg^js2,
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private static final int THRESHOLD = 10; tt&{f <*
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/* 4^^=^c
* (non-Javadoc) ,W$&OD
* R$2\Xl@qQF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1_mqPMm
*/ GCrsf
public void sort(int[] data) { h.xtkD)Y~
int[] temp=new int[data.length]; N.V5>2
mergeSort(data,temp,0,data.length-1); <. V*]g/;
} +^$E)Ol
7#PQ1UWl
private void mergeSort(int[] data, int[] temp, int l, int r) { =|V#~p*
int i, j, k; "Qk)EY
int mid = (l + r) / 2; IRsyy\[kp8
if (l == r) dFk$rr>q
return; .aC/ g?U
if ((mid - l) >= THRESHOLD) d-I&--"ju
mergeSort(data, temp, l, mid); ;(Z9.
else T9YrB
insertSort(data, l, mid - l + 1); F{eI[A
if ((r - mid) > THRESHOLD) Dd:48sN:Jq
mergeSort(data, temp, mid + 1, r); FD8d-G
else =]LALw
insertSort(data, mid + 1, r - mid); *3(mNpi{_
=GC,1WVEqV
for (i = l; i <= mid; i++) { xQxq33\
temp = data; 5C5OLAl v
} V+$fh2t
for (j = 1; j <= r - mid; j++) { /!pJ"@
temp[r - j + 1] = data[j + mid]; =AX"'q
} I$ ?.9&.&
int a = temp[l]; GjX6noqT
int b = temp[r]; B#o6UO\
for (i = l, j = r, k = l; k <= r; k++) { Ime"}*9
if (a < b) { Eu[/* t+l
data[k] = temp[i++]; wu0q.]
a = temp; $AdBX}{
} else { T:*l+<?
data[k] = temp[j--]; [`!%u3
b = temp[j]; ` c"
} scy_
} 7DWGYvv[
} ,Y7QmbX^
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/** C/q!!
* @param data 5i=C?W`'
* @param l pzeCdHF
* @param i /1b7f'
*/ a[E}o<{
private void insertSort(int[] data, int start, int len) { 1YtK+,mz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L fZF
} C40o_1g
} ]&X}C{v)G
} |u+!CR
} /z: mi
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堆排序： W@D./Th
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package org.rut.util.algorithm.support; $t0JfDd6Ky
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import org.rut.util.algorithm.SortUtil; &mm!UJ
x7/";L>
/** Cl!9/l?z
* @author treeroot a`>H69(bU
* @since 2006-2-2 ;*WG9Y(W
* @version 1.0 I8uFMP
*/ e/}4Pt
public class HeapSort implements SortUtil.Sort{ } g%v<'K
&_74h);2I:
/* (non-Javadoc) -B?cF9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e9>~mtx
*/ DKF '*
public void sort(int[] data) { w1eFm:'
MaxHeap h=new MaxHeap(); 'UM *7
h.init(data); G=|~SYz
for(int i=0;i h.remove(); OsKtxtLO
System.arraycopy(h.queue,1,data,0,data.length); 13+.>
} `@#rAW D
/i#";~sO
private static class MaxHeap{ ',/2J0_
{(I":rt#
void init(int[] data){ tHK>w%|\R
this.queue=new int[data.length+1]; PbsxjP
for(int i=0;i queue[++size]=data; tS-gaT`T
fixUp(size); l]OzE-*$b
} ,e$6%R
} ij;P5OA
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private int size=0; AREjS$
bc3`x1)\^
private int[] queue; +wf9!_'
[bRE=Zr$Ry
public int get() { ~S\> F\v6'
return queue[1]; u1=K#5^
} hCS}
MdmN7>
public void remove() { 3R0ioi 7
SortUtil.swap(queue,1,size--); V1~@
fixDown(1); W/AF
} </u=<^ire
file://fixdown "c|Rpzs[
private void fixDown(int k) { ,Vw>3|C
int j; x0WinLQ
while ((j = k << 1) <= size) { ZvMU3])u
if (j < size %26amp;%26amp; queue[j] j++; /(.:l +[w[
if (queue[k]>queue[j]) file://不用交换 |Wjpnz
break; aYDo0?kF'
SortUtil.swap(queue,j,k); zo8D"
k = j; 6)7cw8^
} P=_fYA3
} E&eY79
private void fixUp(int k) { ,Aai-AGG@
while (k > 1) { m uy^>2p
int j = k >> 1; n,2
if (queue[j]>queue[k]) {/H<_
break; Gx6%Z$2n
SortUtil.swap(queue,j,k); &*%x]fQ@
k = j; Jv+w{"&
} g,rmGu3v
} 9@yF7
RB4 +"QUh
} t ^[fu,
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} ;o9ixmT<-o
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SortUtil： &9fQW?Czs
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package org.rut.util.algorithm; w.a9}GC
y<E];ub
import org.rut.util.algorithm.support.BubbleSort; -(]CFnD_N
import org.rut.util.algorithm.support.HeapSort; _io'8X2K%
import org.rut.util.algorithm.support.ImprovedMergeSort; G(TFv\`vH
import org.rut.util.algorithm.support.ImprovedQuickSort; U/^#nU.,
import org.rut.util.algorithm.support.InsertSort; )38%E;T{X
import org.rut.util.algorithm.support.MergeSort; .Zv~a&GE
import org.rut.util.algorithm.support.QuickSort; }`g-eF>p
import org.rut.util.algorithm.support.SelectionSort; M{{kO@P"9
import org.rut.util.algorithm.support.ShellSort; L_RVHvA=M/
;=jF9mV.
/** 9`*Eeb>
* @author treeroot <Q\KS
* @since 2006-2-2 ekL;SN
* @version 1.0 nOvR, 6
*/ d\l{tmte
public class SortUtil { M|mfkIk0MB
public final static int INSERT = 1; '<BLkr# @
public final static int BUBBLE = 2; C2"^YRN,
public final static int SELECTION = 3; }7[]d7
public final static int SHELL = 4; 1+uZF
public final static int QUICK = 5; kpIn_Ea
public final static int IMPROVED_QUICK = 6; C$TU TS
public final static int MERGE = 7; H.ksI;,
public final static int IMPROVED_MERGE = 8; A}(]J!rc
public final static int HEAP = 9; 1>j,v+
k`8O/J
public static void sort(int[] data) { *VsVCUCz5*
sort(data, IMPROVED_QUICK); kt2_WW[
} L AasmQ
private static String[] name={ OW4j!W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5 ix*wu`,
}; U 5J _Y
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private static Sort[] impl=new Sort[]{ &/]en|f"
new InsertSort(), 6I +0@,I
new BubbleSort(), S>~f.
new SelectionSort(), J&>@>47
new ShellSort(), LBCH7@V1yR
new QuickSort(), GHcx@||C?
new ImprovedQuickSort(), ZyUcL_
new MergeSort(), ='o3<}
new ImprovedMergeSort(), i"0Bc{cQ
new HeapSort() MF4(
}; FpRYffT 9u
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public static String toString(int algorithm){ K>$f#^
return name[algorithm-1]; P[ :_"4U
} ls^Z"9P
1RYrUg"s"
public static void sort(int[] data, int algorithm) { <bzzbR[F
impl[algorithm-1].sort(data); UPuoIfuqI
} kL*P 3 0
?IVJ#6[
public static interface Sort { kP ]Up&'
public void sort(int[] data); 'ztOl`I5V
} =9jK\ T^
;t{q]"? W
public static void swap(int[] data, int i, int j) { q*&R&K;q
int temp = data; '[{<aEo
data = data[j]; H{*Dc_
data[j] = temp; D!rPF)K )
} y!#-[K:
} '>"{yi-