[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; yL1CZ_
} 2]WE({P
int i1=l; mT.e>/pa
int i2=mid+1; ,pt%) c
for(int cur=l;cur<=r;cur++){ 8;"*6vHZ
if(i1==mid+1) R_kQPP
data[cur]=temp[i2++]; Q@QFV~
else if(i2>r) k6**u
data[cur]=temp[i1++]; ;[$n=VX`
else if(temp[i1] data[cur]=temp[i1++]; )=^w3y
else EKZVF`L
data[cur]=temp[i2++]; ]%dnKP~
} :}q\tNY<
} \2kPq>hu
^g>1U5c
} ~?Omy8#
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改进后的归并排序: I+;-p]~
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package org.rut.util.algorithm.support; f CcD&<%
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import org.rut.util.algorithm.SortUtil; ~;#MpG;e
}!d;(/)rb
/** *}!MOqP
* @author treeroot '0t-]NAc
* @since 2006-2-2 [aqu}Su
* @version 1.0 KfY$ka[}"S
*/ ,,<PVTd
public class ImprovedMergeSort implements SortUtil.Sort { uCP>y6I
rrBAQY|.
private static final int THRESHOLD = 10; Mz=!w]qDH
yTBS=+X
/* [=%YV# O
* (non-Javadoc) l{WjDed
* Oejq@iM"(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , c;eN
*/ r':TMhzHq?
public void sort(int[] data) { :@3Wg3N
int[] temp=new int[data.length]; /Cr/RG:OX
mergeSort(data,temp,0,data.length-1); b.yh8|&
} 0GXO&rCG
Y)I8eU{Wl(
private void mergeSort(int[] data, int[] temp, int l, int r) { KeBQH8A1N
int i, j, k; *nTU#U
int mid = (l + r) / 2; 8im@4A+n`
if (l == r) /VTM 9)u
return; USPTpjt8R
if ((mid - l) >= THRESHOLD) ANMg
mergeSort(data, temp, l, mid); ~H6;I$e[
else \h{r;#g
insertSort(data, l, mid - l + 1); |M~ON=
if ((r - mid) > THRESHOLD) %y`7);.q
mergeSort(data, temp, mid + 1, r); yy2I2Bv
else cu7(.
insertSort(data, mid + 1, r - mid); ,LYFEq_
(9RslvKL
for (i = l; i <= mid; i++) { ?Dsm~bkX[
temp = data; P=8>c'Q
} F?4(5 K
for (j = 1; j <= r - mid; j++) { kCP$I732
temp[r - j + 1] = data[j + mid]; m <k!^jp
} RDQ^dui
int a = temp[l]; 6f%DpJ:$U
int b = temp[r]; RMXzU
for (i = l, j = r, k = l; k <= r; k++) { yJJ4~j){l
if (a < b) { EeQ5vqU
data[k] = temp[i++]; yJ2B3i@T4
a = temp; 4&X*pL2;
} else { g /+oZU
data[k] = temp[j--]; WE!vSZ3R
b = temp[j]; 'c`jyn
} (?&=T.*^
} ;h/pnmhP
} 2j&@p>
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/** ${&5]!E[>D
* @param data E l&h;N
* @param l rAqxTdF
* @param i &eZfQ27$
*/ 1cJsj
private void insertSort(int[] data, int start, int len) { i u]&;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tpf7_YP_!-
} +C{p%`<
} A}VYb:u/
} (!K_Fy@
} Oe]&(
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堆排序： lX!`zy{3k
i^"+5Eq[D
package org.rut.util.algorithm.support; U9d:@9Y
}ZOFYu0f
import org.rut.util.algorithm.SortUtil; @ GDX7TPV
QB{rVI>mI!
/** }xb=<
* @author treeroot OEgI_=B
* @since 2006-2-2 9}tG\0tL*
* @version 1.0 h8 @
*/ @9G- m(?*
public class HeapSort implements SortUtil.Sort{ df*w>xS
RuRt0Sd3
/* (non-Javadoc) f"5g>[1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Ezgn/bS&
*/ JWO=!^
public void sort(int[] data) { =P77"Dd
MaxHeap h=new MaxHeap(); TYgQJW?
h.init(data); |$lwkC)O
for(int i=0;i h.remove(); o>D
System.arraycopy(h.queue,1,data,0,data.length); '` CspY
} \' li
akuJz
private static class MaxHeap{ RMYP"
-e@!
void init(int[] data){ $ChK]v 6C
this.queue=new int[data.length+1]; }-<zWI{p
for(int i=0;i queue[++size]=data; qCMl!g'
fixUp(size); ]dPZ.r
} p='-\M74K
} hsLzj\)6
hP@(6X,"
private int size=0; wo^Sy41bF
(&\aA 0-}H
private int[] queue; ;e8V +h
/\d$/~BFi
public int get() { UHO_Z
return queue[1]; ]gb=
} S[:xqzyDg
irBDGT~
public void remove() { g^>#^rLU
SortUtil.swap(queue,1,size--); GR4?BuY,
fixDown(1); H^%.=kf
} -`c:}m
file://fixdown Ju` [m
private void fixDown(int k) { } /^C|iS7
int j; q" @
while ((j = k << 1) <= size) { `cB_.&
if (j < size %26amp;%26amp; queue[j] j++; D$eB ,~
if (queue[k]>queue[j]) file://不用交换 /'DwfX
break; 7Hw<ojkt
SortUtil.swap(queue,j,k); }odV_WT
k = j; ,Fqz e/
} pb;")Q'
} {y^3> 7
private void fixUp(int k) { =d;Vk
while (k > 1) { !cEG}(|h
int j = k >> 1; $A\m>*@
if (queue[j]>queue[k]) ekSY~z=/u
break; i^z`"3#LE
SortUtil.swap(queue,j,k); P1zK2sL_
k = j; !E\[SjY@J
} }qPhx6nP
} 'md0]R|
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} f>Td)s1 M
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} rjA@U<o
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SortUtil： W=}Okq)x9I
/!FWuRe^
package org.rut.util.algorithm; *=F(KZ
B33$ u3d
import org.rut.util.algorithm.support.BubbleSort; *tQk;'/A]
import org.rut.util.algorithm.support.HeapSort; M++0zhS
import org.rut.util.algorithm.support.ImprovedMergeSort; WV<tyx9Z
import org.rut.util.algorithm.support.ImprovedQuickSort; 8s}J!/2
import org.rut.util.algorithm.support.InsertSort; zi]%Zp
import org.rut.util.algorithm.support.MergeSort; jh ez
import org.rut.util.algorithm.support.QuickSort; .q`{Dgc~
import org.rut.util.algorithm.support.SelectionSort; #G^A-yjn
import org.rut.util.algorithm.support.ShellSort; Sq]pQ8
jB$SUO`*
/** g;p)n
* @author treeroot H3/caN:
* @since 2006-2-2 1cN')"
* @version 1.0 VAQ)Hc]
*/ [.yJV`
public class SortUtil { =5]n\"/
public final static int INSERT = 1; ?^!,vh
public final static int BUBBLE = 2; yOXO)u1n
public final static int SELECTION = 3; Q'NmSX)0
public final static int SHELL = 4; 9>*c_
public final static int QUICK = 5; czWw~'."
public final static int IMPROVED_QUICK = 6; 42) mM#
public final static int MERGE = 7; ,i}|5ozj4
public final static int IMPROVED_MERGE = 8; \|=mD}N
public final static int HEAP = 9; n$+M%}/f
'%iPVHK7
public static void sort(int[] data) { )6oGF>o>
sort(data, IMPROVED_QUICK); 5a`%)K
} |WQ9a' '
private static String[] name={ O_,O,1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U..<iNQE5
}; [IX+M#mf
f_mhD dq
private static Sort[] impl=new Sort[]{ .QWhK|(.!
new InsertSort(), =jAFgwP\
new BubbleSort(), lP<I|O=z
new SelectionSort(), Se^^E.Z,W
new ShellSort(), >wON\N0V_
new QuickSort(), -e-e9uP
new ImprovedQuickSort(), E0f{iO;}
new MergeSort(), xN->cA$A
new ImprovedMergeSort(), y2Bh?>pg
new HeapSort() :KE/!]z
}; Pi6C/$ K
5>0.NiXGf'
public static String toString(int algorithm){ "cUg>a3
return name[algorithm-1]; i2,U,>.
} 1JS2SxF
T|4snU2M
public static void sort(int[] data, int algorithm) { Z|6{T
impl[algorithm-1].sort(data); d.F)9h]XHO
} !XE aF]8
&_-](w`
public static interface Sort { LK7Xw3
public void sort(int[] data); , |E$'
} HxwlYx,4
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public static void swap(int[] data, int i, int j) { |Fln8wB
int temp = data; C".1+Um
data = data[j]; NlPS#
data[j] = temp; 2Oc$+St~8
} ? 5|/ C
} 2ypIq