[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; o]/*YaB2>
} >n$V1U&/
int i1=l; VJbsM1y M
int i2=mid+1; Yw=7(}
for(int cur=l;cur<=r;cur++){ c||EXFS}O
if(i1==mid+1) XX&4OV,^%D
data[cur]=temp[i2++]; nl<TM96
else if(i2>r) |?A:[C#X
data[cur]=temp[i1++]; X!,huB^i
else if(temp[i1] data[cur]=temp[i1++]; ^G(U@-0..
else j/ [V<
data[cur]=temp[i2++]; .ni<'
} {$qE>ic
} 3qf?n5"8
(;VlK#rnC
} ES,T[
w3Lr~_j
改进后的归并排序: IVSOSl|
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package org.rut.util.algorithm.support; UOIB}ut V
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import org.rut.util.algorithm.SortUtil; W{A4*{
J4?i\wD:
/** Mh"X9-Ot
* @author treeroot 6mV-+CnYC
* @since 2006-2-2 w1Txz4JqB
* @version 1.0 qXqGhHoe;
*/ 2ieyU5q7#
public class ImprovedMergeSort implements SortUtil.Sort { @cB7tY*Ski
9]C%2!Ur,
private static final int THRESHOLD = 10; B/O0 ~y!n
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/* Oh# z zo
* (non-Javadoc) a\-AGG{2/X
* :A7\eN5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &cGa~#-u
*/ |PtfG2Ty?
public void sort(int[] data) { %lq[,6?>5
int[] temp=new int[data.length]; [s4|+
mergeSort(data,temp,0,data.length-1); w)N~u%
} :a/l9 m(
r[g
private void mergeSort(int[] data, int[] temp, int l, int r) { xO[V>Ud
int i, j, k; T<oDLJA\
int mid = (l + r) / 2; S-'R84M,F
if (l == r) mF:Pplf<
return; =U7P\sw2
if ((mid - l) >= THRESHOLD) mqtX7rej
mergeSort(data, temp, l, mid); ]f{3_M[
else HmiG%1+{A
insertSort(data, l, mid - l + 1); %@9c'6
if ((r - mid) > THRESHOLD) UpaF>,kM
mergeSort(data, temp, mid + 1, r); QUeuN?3X\
else .af+h<RG4$
insertSort(data, mid + 1, r - mid); }7*|s+F(f
'B:8tv
for (i = l; i <= mid; i++) { hCBre5
temp = data; av&~A+b.r
} qxB|*P`
for (j = 1; j <= r - mid; j++) { gLm,;'h%u
temp[r - j + 1] = data[j + mid]; /:tzSKq}
} fUMjLA|*I<
int a = temp[l]; }W)b
int b = temp[r]; Jxf>!\:AZu
for (i = l, j = r, k = l; k <= r; k++) { &V|kv"Wwj
if (a < b) { .Hnhd/ c
data[k] = temp[i++]; d.|*sZ&3p
a = temp; dbJ3E)rF
} else { AL!ppi
data[k] = temp[j--]; sZI"2[bk
b = temp[j]; WeJ=]7T'L
} !9.k%B:
} ~R&rQJJeJ
} JC0#pU;
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/** s"@}^ )*}
* @param data 4a0Ud !Qcs
* @param l ~&?57Sw*m
* @param i 0K'{w]Q
*/ 5vFM0
private void insertSort(int[] data, int start, int len) { zo1T`"Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); inY_cn?
} &gJ1*"$9
} B(WmJ6e
} ;>uB$8<_7
} B}S+/V` Y5
3[j,d]\|
堆排序： =+LIGHIt
_Pno9|
package org.rut.util.algorithm.support; Zs(BViTb|
c2t`i
import org.rut.util.algorithm.SortUtil; _aYhW{wW
7]} I
/** R?zlZS.~
* @author treeroot idB1%?<
* @since 2006-2-2 eL>wKu:r
* @version 1.0 p5jR;nOZ%l
*/ !E&l=*lM.
public class HeapSort implements SortUtil.Sort{ :tBe/(e4#
)RN3Oz@H
/* (non-Javadoc) 0cSm^a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vh.-9eD
*/ Zb=;\l*&
public void sort(int[] data) { {+zG.1o^
MaxHeap h=new MaxHeap(); V:#rY5X
h.init(data); gg.]\#3g
for(int i=0;i h.remove(); &#JYh=#
System.arraycopy(h.queue,1,data,0,data.length); [(2^oTSRaq
} fP:]s@$
mKjTJzS
private static class MaxHeap{ O&MH5^I
;O1jf4y
void init(int[] data){ LofpBO6^
this.queue=new int[data.length+1]; b}fC' h
for(int i=0;i queue[++size]=data; BYu(a
fixUp(size); >|, <9z`D
} ~;jgl_5?b
} \s%g'g;
rrR"2WuGO
private int size=0; <o9AjASv\,
$@@ii+W}\
private int[] queue; :-O$rm
'j*Q
public int get() { qH0JZdk
return queue[1]; %X's/;(Lx`
} sBYDo{01
ZBR^$?nj
public void remove() { BdMd\1eMw
SortUtil.swap(queue,1,size--); w+"E{#N
fixDown(1); w>8HS+
} c0Bqm
file://fixdown 2<9K}Of
private void fixDown(int k) { z{&Av
int j; _YG@P1
while ((j = k << 1) <= size) { )Nqx=ms[(!
if (j < size %26amp;%26amp; queue[j] j++; |{(JUXo6K
if (queue[k]>queue[j]) file://不用交换 GZWqPM4S\
break; epKr6 xq
SortUtil.swap(queue,j,k); I{0cnq/
k = j; !@])Ut@tN
} 0ETT@/)]z
} w&f>VB~,1
private void fixUp(int k) { dH.Fb/7f
while (k > 1) { G62;p#
int j = k >> 1; >?OUs>}3y2
if (queue[j]>queue[k]) u:']jw=f
break; n_4.`vs
SortUtil.swap(queue,j,k); Uj\t04
k = j; M*bsA/Z
} Y-Q)sv
} (&NLLrsio
k~so+k&=b
} &OZx!G^Z
:-#7j} R&
} T59FRX
eI:x4K,#
SortUtil： ]KEE+o
[L7s(Zs>
package org.rut.util.algorithm; tK[o"?2y
lwfM>%%N
import org.rut.util.algorithm.support.BubbleSort; x1Y/^ks@2
import org.rut.util.algorithm.support.HeapSort; @I|kY5'c
import org.rut.util.algorithm.support.ImprovedMergeSort; kP}l"CN4
import org.rut.util.algorithm.support.ImprovedQuickSort; VRgckh m
import org.rut.util.algorithm.support.InsertSort; n|?sNM<J3
import org.rut.util.algorithm.support.MergeSort; zRmVV}b
import org.rut.util.algorithm.support.QuickSort; H;NAS/OhS
import org.rut.util.algorithm.support.SelectionSort; ?]bx]Y;
import org.rut.util.algorithm.support.ShellSort; ZbVn"he
)X," NJG
/** "=K3sk
* @author treeroot V~#5^PF{
* @since 2006-2-2 I$S*elveG
* @version 1.0 sVFX(yx0
*/ Xs|d#WbX
public class SortUtil { L~e0^X?
public final static int INSERT = 1; ;F*^c )
public final static int BUBBLE = 2; m>48?%
public final static int SELECTION = 3; rXzq:
public final static int SHELL = 4; [kpQ:'P3
public final static int QUICK = 5; >r C*.
public final static int IMPROVED_QUICK = 6; 6W
public final static int MERGE = 7; so1
public final static int IMPROVED_MERGE = 8; yPT o,,ca=
public final static int HEAP = 9; 5D=U.UdR
]@cI_n
public static void sort(int[] data) { ZvQZD=,F
sort(data, IMPROVED_QUICK); 7Y-Q, ?1
} AX&Emz-
private static String[] name={ GIkeZV{4}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ct?xTFb
}; 6iXV
?./fVoA]V
private static Sort[] impl=new Sort[]{ 1u5^a^O(|
new InsertSort(), ]K8G}|Wy6
new BubbleSort(), -hfkF+=U'
new SelectionSort(), suIYfjh
new ShellSort(), \2[tM/+Bs
new QuickSort(), -dF (_ %C
new ImprovedQuickSort(), RTvOaZ
new MergeSort(), AxH`4=3<
new ImprovedMergeSort(), ~N}Zr$D
new HeapSort() g~,iWoY
}; A-.Wd7^~*
ReD]M@;
public static String toString(int algorithm){ O(-6Zqk8Q
return name[algorithm-1]; kG9aHWw
} As5l36
6< -Cpc
public static void sort(int[] data, int algorithm) { 6C"zBJcGc
impl[algorithm-1].sort(data); RTbV!I
} !mWm@}Ujg
7&HcrkP]
public static interface Sort { v9,cL.0&
public void sort(int[] data); p:$v,3:
} B 5qy4MFWs
-qvMMit%7
public static void swap(int[] data, int i, int j) { %jf|efxo
int temp = data; yn@wce
data = data[j]; [~cz|C#
data[j] = temp; Z eY*5m
} }#M>CNi'PU
} ;.xKVH/@