[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; d{f3R8~Q.
} =>hq0F4[;
int i1=l; $;_'5`xs
int i2=mid+1; & CiUU
for(int cur=l;cur<=r;cur++){ PiZt?r?5w|
if(i1==mid+1) @\_tS H
data[cur]=temp[i2++]; hltH{4
else if(i2>r) buRXzSR
data[cur]=temp[i1++]; \K)"@gdW
else if(temp[i1] data[cur]=temp[i1++]; zVs_|x="
else L;xc,"\3
data[cur]=temp[i2++]; GG\]}UjX
} #Xri%&~
} MjG=6.J|`
9oP8| <+
} O!zH5
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改进后的归并排序: HB\y [:E
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package org.rut.util.algorithm.support; #GK&{)$
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import org.rut.util.algorithm.SortUtil; A5Yfm.Jy
.*D~ .!
/** m4ovppC
* @author treeroot QQ97BP7W
* @since 2006-2-2 >E?626*
* @version 1.0 [e ;K$
*/ G3 #c
public class ImprovedMergeSort implements SortUtil.Sort { GS~jNZx
E/LR(d_
private static final int THRESHOLD = 10; m$A|Sx&sG$
uKh),@JV
/* }MrRsvN
* (non-Javadoc) aD3'gc,l
* J}KATpHs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hti)<#f
*/ 52K3N^RgR
public void sort(int[] data) { of8/~VO
int[] temp=new int[data.length]; c^UG}:Y
mergeSort(data,temp,0,data.length-1); rayC1#f
} _i:yI-jA
+WK!}xZR
private void mergeSort(int[] data, int[] temp, int l, int r) { 2@1A,
int i, j, k; HlPf
int mid = (l + r) / 2; +D`IcR-x
if (l == r) .!,T>:R
return; #=5/D@
if ((mid - l) >= THRESHOLD) Am!$\T%2
mergeSort(data, temp, l, mid); &BCl>^wn}
else c&AA< 6pkv
insertSort(data, l, mid - l + 1); O|#^&d
if ((r - mid) > THRESHOLD) a~7`;Ar
mergeSort(data, temp, mid + 1, r); S!2M?}LU
else *xM4nUu<~
insertSort(data, mid + 1, r - mid); yu<sd}@
br>"96A1l
for (i = l; i <= mid; i++) { E*.D_F
temp = data; _%;$y5]v
} OYgD9T.8^
for (j = 1; j <= r - mid; j++) { mE%H5&VSI
temp[r - j + 1] = data[j + mid]; m/JpYv~
} EP'2'51
int a = temp[l]; B:a&)Lwp0
int b = temp[r]; %[-D&flKC
for (i = l, j = r, k = l; k <= r; k++) { ^4O1:_|G
if (a < b) { 4At%{E
data[k] = temp[i++]; Obrv5%'
a = temp; Q~#udEajI
} else { 5pI2G
data[k] = temp[j--]; 65\'(99yU
b = temp[j]; BE:HO^-.1
} 0tC+?
} uYhm Fp
} {XC# -3O
SQ]&nDd
/** nxKV7d@R
* @param data O2q`2L~
* @param l F# y5T3(P
* @param i hoD (G X
*/ ZTVX5"#Q
private void insertSort(int[] data, int start, int len) { 4W*52*'F,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TPt<(-}W
} /^G1wz2
} g[0b>r7
} `!kOyh:X
} *@S:f"i
PP.QfY4
堆排序： R^<li;Km
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package org.rut.util.algorithm.support; /w^}(IJ4
p2GkI/6)uu
import org.rut.util.algorithm.SortUtil; =66dxU?}
'0[D-jEr
/** ?V4?r2$c
* @author treeroot (q59cAw~X
* @since 2006-2-2 f6j;Y<}' g
* @version 1.0 93$'PwWgiF
*/ 1\=)b< y
public class HeapSort implements SortUtil.Sort{ C,P>7
M^AwOR7<
/* (non-Javadoc) 3E$M{l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %(MaH
*/ 6.ASLH3#
public void sort(int[] data) { a"EX<6"
MaxHeap h=new MaxHeap(); |77.Lqqy,
h.init(data); L%}k.)yev
for(int i=0;i h.remove(); zXx HaM
System.arraycopy(h.queue,1,data,0,data.length); d`5xd@p
} KaNi'=nW
n#Q;bSw
private static class MaxHeap{ O; 7`*}m
?{NP3
void init(int[] data){ "-88bF~
this.queue=new int[data.length+1]; y4PR&^l?g
for(int i=0;i queue[++size]=data; 'c*Q/C;
fixUp(size); ~,WG284
} eRKuy l
} LuM:dJ
rU=qr&f"B
private int size=0; brx 7hI
zc01\M
private int[] queue; J]yUjnQ[h
-~\R.<+
public int get() { N DZ :`D
return queue[1]; 1@rI4U@D
} v;AsV`g
}:<`L\8q\
public void remove() { S<#>g s4
SortUtil.swap(queue,1,size--); {4J:t_<nKO
fixDown(1); ecDni>W
} V9&7K65-1
file://fixdown <ZcJC+k
private void fixDown(int k) { p2 V8{k
int j; 2$?bLvk
while ((j = k << 1) <= size) { o@*eC L=
if (j < size %26amp;%26amp; queue[j] j++; @/FE!6 |O
if (queue[k]>queue[j]) file://不用交换 y.(Yh1
break; iZ}Afj
SortUtil.swap(queue,j,k); KX D&FDkF
k = j; M3P\1
} yB0xa%
} 3tzb@T
private void fixUp(int k) { .sI*\@w.
while (k > 1) { VPW@y
int j = k >> 1; 7DZxrVw
if (queue[j]>queue[k]) :FB-GNd
break; w.Cw)#N
SortUtil.swap(queue,j,k); qWX%[i%
k = j; 7iMBDkb7
} zGzeu)d
} N^</:R
5x856RQ'
} nwuH:6~"
eB%hP9=:x
} XrP'FLY o
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SortUtil： vP6NIcWC3
t|-TG\Q X
package org.rut.util.algorithm; t6u>_She
:5|'C
import org.rut.util.algorithm.support.BubbleSort; R9XISsM^
import org.rut.util.algorithm.support.HeapSort; eajctkzj
import org.rut.util.algorithm.support.ImprovedMergeSort; )45~YDS;t
import org.rut.util.algorithm.support.ImprovedQuickSort; } DQ<YF+
import org.rut.util.algorithm.support.InsertSort; ?+Gc.lU
import org.rut.util.algorithm.support.MergeSort; >=Bl/0YH
import org.rut.util.algorithm.support.QuickSort; lw+Y_;
import org.rut.util.algorithm.support.SelectionSort; ASGV3r(
import org.rut.util.algorithm.support.ShellSort; {zzc/!|
U}f"a!
/** DBTeV-G9~R
* @author treeroot OM,Dy&Y
* @since 2006-2-2 h0**[LDH
* @version 1.0 *rKj%Me
*/ <"/b 5kc
public class SortUtil { N;Hoi8W
public final static int INSERT = 1; >A&D/kMO
public final static int BUBBLE = 2; @}9*rWJIE
public final static int SELECTION = 3; P:D@5
public final static int SHELL = 4; qZQB"Q.*
public final static int QUICK = 5; , e^&,5b
public final static int IMPROVED_QUICK = 6; ~dc o
public final static int MERGE = 7; 9;2{=,
public final static int IMPROVED_MERGE = 8; hA=.${uIO
public final static int HEAP = 9; WO;2=[#O;
lU?8<X
public static void sort(int[] data) { Q9T/@FX
sort(data, IMPROVED_QUICK); `r#]dT[g
} hk*@<ff
private static String[] name={ 1fgO3N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BjX*Gm6l
}; ,4W~CkLD
%u=b_4K"j
private static Sort[] impl=new Sort[]{ kPRG^Ox8e
new InsertSort(), 6&oaxAp<s
new BubbleSort(), s!73To}>
new SelectionSort(), :O?+Ywn
new ShellSort(), UP<B>Y1a
new QuickSort(), \7V[G6'{
new ImprovedQuickSort(), Sb QM!Q
new MergeSort(), uuaoBf
new ImprovedMergeSort(), ?uAq goCl
new HeapSort() A4K8DP
}; y26?>.!
gn-@OmIs
public static String toString(int algorithm){ hl}iw_e
return name[algorithm-1]; FTgqE@
} $sILCn
k'6x_ G
public static void sort(int[] data, int algorithm) { x*'2%3C~
impl[algorithm-1].sort(data); =w!>/#U
} 9 AWFjoXl"
zrDcO~w
public static interface Sort { =Ju%3ptH0
public void sort(int[] data); 5,_DM
} JnE\z*NB
y.>1r7
public static void swap(int[] data, int i, int j) { 1S{AGgls5
int temp = data; 62.)fCQ^
data = data[j]; J;DTh ]z?:
data[j] = temp; bVxbQ$
} !kW~s_gUb*
} ;$.^