[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; L!DP*XDp
} ^l ~i>:V
int i1=l; S(Xab_DT)H
int i2=mid+1; $\$5::}r
for(int cur=l;cur<=r;cur++){ b3x!tuQn
if(i1==mid+1) 8OZc:/
data[cur]=temp[i2++]; U=p,drF,A
else if(i2>r) z:|4S@9
data[cur]=temp[i1++]; .wx;!9
else if(temp[i1] data[cur]=temp[i1++]; zO2Z\E'%.
else Zo22se0)
data[cur]=temp[i2++]; nvxftbfE^D
} N9Yc\?_NU_
} Tul_/`An
|~CN]N
} x9~d_>'A
7f'9Dm`
改进后的归并排序: O(h4;'/E
X&t)S?eCos
package org.rut.util.algorithm.support; Nj qUUkc
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import org.rut.util.algorithm.SortUtil; *8fnxWR
Txfu%'2)e
/** ZyT9y
* @author treeroot FlRbGg^
* @since 2006-2-2 +o!".Hp
* @version 1.0 q.t>:`
*/ 7Xm pq&g
public class ImprovedMergeSort implements SortUtil.Sort { uOEy}&fH
IBC P6[
private static final int THRESHOLD = 10; NHUx-IqOX
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/* <u*~RYA2
* (non-Javadoc) s6rdQI]
* M/ 0!B_(R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1fm\5/}'`1
*/ d /jO~+jP
public void sort(int[] data) { "ZNiTND
int[] temp=new int[data.length]; P(d4~hS
mergeSort(data,temp,0,data.length-1); ^{_`jE
} <jQ?l%\
j{IAZs#@>
private void mergeSort(int[] data, int[] temp, int l, int r) { gpe^G64c`
int i, j, k; IR?ICXmtx
int mid = (l + r) / 2; ?3Se=7 k
if (l == r) M&~3fRb4
return; =E8lpN'
if ((mid - l) >= THRESHOLD) g9H~\w
mergeSort(data, temp, l, mid); vdYd~>w
else {%'(IJ|5z
insertSort(data, l, mid - l + 1); B5IS-d
if ((r - mid) > THRESHOLD) B8'" ^a^&-
mergeSort(data, temp, mid + 1, r); i))S%!/r~
else cV_nYcLkz
insertSort(data, mid + 1, r - mid); C#`eN{%.YT
}L{en
for (i = l; i <= mid; i++) { ync2X{9D
temp = data; zJOjc/\
} =GTltFqI1
for (j = 1; j <= r - mid; j++) { GNA:|x
temp[r - j + 1] = data[j + mid]; E#`=xg
} {^1GHU
int a = temp[l]; \Q|1I
int b = temp[r]; G@oY2sM"
for (i = l, j = r, k = l; k <= r; k++) { 3aQWzEnh
if (a < b) { :t8(w>oW
data[k] = temp[i++]; =M>1;Qr<Z/
a = temp; D%N^iJC,9
} else { =2BGS\$#
data[k] = temp[j--]; j#"?Oe{_1
b = temp[j]; t(-noy)
} GN /]^{D
} PCH&eTKN
} RRqHo~*0
)dbi
/** W^ict,t
* @param data nKp='>Th
* @param l Vz!W(+
* @param i !krbGpTVH
*/ ce\]o^4
private void insertSort(int[] data, int start, int len) { p3`'i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P}KN*Hn.
} -LJbx<'
} I#zrz3WU
} %kS+n_*
} U,yU-8z/
$(H%|Oyn
堆排序： }+h/2D
^I@1y}xi
package org.rut.util.algorithm.support; ZWQrG'$?o8
k]!Fh^O~,
import org.rut.util.algorithm.SortUtil; UJ1iXV[h"
)d!,,o
/** 6e(|t2^
* @author treeroot w?d~c*4+
* @since 2006-2-2 QM=M<~<Voh
* @version 1.0 8Gzc3
*/ 4pq@o
public class HeapSort implements SortUtil.Sort{ X(U CN0#
?~$0;5)QC
/* (non-Javadoc) )Ge.1B$8h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Jrtm7
*/ ]y>)es1
public void sort(int[] data) { -Mx"ox
MaxHeap h=new MaxHeap(); !Low%rP
h.init(data); r5h}o)J
for(int i=0;i h.remove(); Sg(fZ' -
System.arraycopy(h.queue,1,data,0,data.length); ~^cx a%
} , \|S BS
d!5C$C/x
private static class MaxHeap{ CvKXVhf0$J
"rOe J~4 X
void init(int[] data){ $@"o BCc
this.queue=new int[data.length+1]; yT%"<m6Y*\
for(int i=0;i queue[++size]=data; >!MOgLO3
fixUp(size); ^E*W B~
} oMawINDa
} %Sr/'7 K
f^z~{|%l!
private int size=0; ZdJwy%
I&?(=i)N
private int[] queue; O}I8P")m
hqIYo .<
public int get() { N=^{FZ
return queue[1]; r63_|~JVB<
} 55MrsiW
_\hZX|:]
public void remove() { G=W!$(:
SortUtil.swap(queue,1,size--); ~s{yh-B
fixDown(1); 0OO$(R*
} 3o&PVU?Q
file://fixdown j/`-x
private void fixDown(int k) { :Fz;nG-G
int j; ?piv]Z
while ((j = k << 1) <= size) { {</MC`
if (j < size %26amp;%26amp; queue[j] j++; 4bLk+EY4A
if (queue[k]>queue[j]) file://不用交换 SIv8EMGo
break; "jqC3$DKI
SortUtil.swap(queue,j,k); ^-?5=\`5
k = j; S=H<5*]g
} ++n"` ]o,
} 6nqG;z-IXJ
private void fixUp(int k) { ,#3u.=IR[
while (k > 1) { {WQH
int j = k >> 1; P0NGjS|Z{
if (queue[j]>queue[k]) _PD RUJ
break; X]ow5{e
SortUtil.swap(queue,j,k); ~V&4<=r`
k = j; gpW3zDJ
} JRt^YX
} v-M3/*
q"xIW0Pc
} ngJi;9X8*t
>=Hm2daN
} 6REv(E]
3mKmd iD
SortUtil： qD=o;:~Km
NfvvwG;M
package org.rut.util.algorithm; =67dpQ'y
)';Rb$<Qn
import org.rut.util.algorithm.support.BubbleSort; 5$Lo]H*
import org.rut.util.algorithm.support.HeapSort; M\O6~UFq!
import org.rut.util.algorithm.support.ImprovedMergeSort; Tap=K|b ]
import org.rut.util.algorithm.support.ImprovedQuickSort; AoB~ZWq
import org.rut.util.algorithm.support.InsertSort; VP[-BK[
import org.rut.util.algorithm.support.MergeSort; XDs )
import org.rut.util.algorithm.support.QuickSort; 1T:M?N8J
import org.rut.util.algorithm.support.SelectionSort; \?uaHX`1
import org.rut.util.algorithm.support.ShellSort; "D0:Y(\
dzJ\+ @4
/** CA%p^4Q
* @author treeroot 8Q&.S)hrN
* @since 2006-2-2 !T;*F%G9
* @version 1.0 rvO7e cR"
*/ ~>u]ow=
public class SortUtil { w:xLg.Eq6
public final static int INSERT = 1; "Y0:Y?Vz"
public final static int BUBBLE = 2; *)0bifw$&
public final static int SELECTION = 3; c@9jc^CJ
public final static int SHELL = 4; "^E/N},%u5
public final static int QUICK = 5; PhBdm'
public final static int IMPROVED_QUICK = 6; }%(e`[?1
public final static int MERGE = 7; 7L~LpB
public final static int IMPROVED_MERGE = 8; EH))%LY1y
public final static int HEAP = 9; ?w'a^+H
fDyFkhc
public static void sort(int[] data) { bl@0+NiM
sort(data, IMPROVED_QUICK); 59K%bz5t
} 0"q_c-_Bg
private static String[] name={ %zj;~W;qPH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y@x }b{3
}; HDqPqrWm
LDlj4>%pW^
private static Sort[] impl=new Sort[]{ VK\ Bjru9
new InsertSort(), "#bL/b'{
new BubbleSort(), bB^% O^:
new SelectionSort(), k8fvg4
new ShellSort(), _~!*|<A_
new QuickSort(), !u~h.DrvZ
new ImprovedQuickSort(), b]S4\BBT
new MergeSort(), .b] 32Ww
new ImprovedMergeSort(), W+k`^A|@
new HeapSort() PZ5BtDm
}; 7tWt3
P<P4*cOV
public static String toString(int algorithm){ )zw}+z3st
return name[algorithm-1]; B.wihJVDg
} V_Z~$
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public static void sort(int[] data, int algorithm) { mXZOkx{
impl[algorithm-1].sort(data); @Dc?fyY*o<
} \2cbZQx
jP'.a. ^o$
public static interface Sort { wI'8B{[
public void sort(int[] data); xK4b(KJj
} Cb}hE ro
,VZ;=
public static void swap(int[] data, int i, int j) { b;$ -s \%
int temp = data; Ju5<wjQR\
data = data[j]; >C""T`5]
data[j] = temp; XVXiiQ^
} { ?p55o
} !(\OT