[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; gSi5u#}J
} HMQI&Lh=U
int i1=l; ZW4aY}~)$
int i2=mid+1; i?}>.$j
for(int cur=l;cur<=r;cur++){ UsW5d]i}Y
if(i1==mid+1) t 0O4GcAN
data[cur]=temp[i2++]; L4'[XcY
else if(i2>r) L10IF
data[cur]=temp[i1++]; %_)zWlN
else if(temp[i1] data[cur]=temp[i1++]; |"7Pv skT
else 7!4V>O8@
data[cur]=temp[i2++]; >.%4~\U
} 1=GI&f2I
} kA?_%fi1
4MvC]_&
} {[#(w75R{
h[Tk;h
改进后的归并排序: "~+.Af
)C]x?R([m
package org.rut.util.algorithm.support; V0i9DK|!
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import org.rut.util.algorithm.SortUtil; .Ao0;:;(2-
MK$Jj"
/** q? z>
* @author treeroot |ng%PQq)
* @since 2006-2-2 s@@1 *VQ
* @version 1.0 Ob@Hng%v
*/ G2Qjoe`Uc
public class ImprovedMergeSort implements SortUtil.Sort { DZ`k[Z.VZ
=Viy^ieN$
private static final int THRESHOLD = 10; F8mC?fbK9
Yv\!vW7I
/* g`Md80*Zfk
* (non-Javadoc) 00<{:
* ExhL[1E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HtBF=Boq
*/ &a #GXf
public void sort(int[] data) { \HSicV#i
int[] temp=new int[data.length]; z1j|E :
mergeSort(data,temp,0,data.length-1); szq+@2:
} 7sV/_3H+
3oBC
private void mergeSort(int[] data, int[] temp, int l, int r) { ZwJciT!_~
int i, j, k; sBW3{uK
int mid = (l + r) / 2; ;;#nV$
if (l == r) y:so L:(F
return; EZj1jpL
if ((mid - l) >= THRESHOLD) @EZ>f5IO+
mergeSort(data, temp, l, mid); C3"&sdLb$
else $G";2(-k
insertSort(data, l, mid - l + 1); gA:TL{X0
if ((r - mid) > THRESHOLD) bx;f`8SN
mergeSort(data, temp, mid + 1, r); qu{mqkfN>
else J_"3UZ~&
insertSort(data, mid + 1, r - mid); {BOLPE-
rz
for (i = l; i <= mid; i++) { &?<AwtNN
temp = data; _Z#eS/,O@
} 8&(-8
for (j = 1; j <= r - mid; j++) { 4XG]z_+I
temp[r - j + 1] = data[j + mid]; VXC4%
} %$n02"@
int a = temp[l]; dr]&kqm
int b = temp[r]; iJnh$jo
for (i = l, j = r, k = l; k <= r; k++) { h|W%4|]R)
if (a < b) { TVkcDS
data[k] = temp[i++]; $I8[BYblB
a = temp; &9P<qU^N)
} else { a@W7<9fY;
data[k] = temp[j--]; OlGR<X
b = temp[j]; r%-n*_?.s
} TA;,>f*
} y^s1t2]%
} n2'|.y}Um:
P;GprJ`l
/** qi\n]I
* @param data rO^xz7K^
* @param l 2%YXc|gGT
* @param i DrS?=C@
*/ ^, wnp@
private void insertSort(int[] data, int start, int len) { $c=&0yt5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oyvtZ/@
} mxL;;-
} TzF0/T!
} *.8:'F
} *8-p7,D
2Ow<`[7
堆排序： a<p %hY3
+Jq`$+%C
package org.rut.util.algorithm.support; !;WbOnLP
-1mvhR~
import org.rut.util.algorithm.SortUtil; d}% (jJ(I
`o-*Tr
/** lU$X4JBzS
* @author treeroot ^x3EotQ\
* @since 2006-2-2 z93nYY$`Y
* @version 1.0 ;&mxqY8`'
*/ 6ZgNHARS
public class HeapSort implements SortUtil.Sort{ p#<nK+6.8
Q\WXi
/* (non-Javadoc) %UG/ak%z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )E~mJln
*/ taV|YP$
public void sort(int[] data) { F@^N|;_2
MaxHeap h=new MaxHeap(); PP4d?+;V
h.init(data); 5"2@NL
for(int i=0;i h.remove(); ,.7vBt6 p
System.arraycopy(h.queue,1,data,0,data.length); !E0fGh
} MPG+B/P&
g RU-g
private static class MaxHeap{ )@$ &FFIu
$i%HDt|
void init(int[] data){ m3"c (L`B
this.queue=new int[data.length+1]; dqz1xQ1
for(int i=0;i queue[++size]=data; Sj1r s#@1
fixUp(size); Sw "|iBZ@
} 4k*qVOBa6R
} %mmxA6I
6vWii)O.D
private int size=0; B$`d&7I;D
gix>DHq$k
private int[] queue; eoL0^cZj
%IU4\ZY>
public int get() { |VYr=hjo
return queue[1]; I1v@\Rb
} NYwGK|
w(#:PsMo<
public void remove() { W U0UG$o`
SortUtil.swap(queue,1,size--); 0#]!#1utg
fixDown(1); 0STk)>3$-
} SZE`J:w
file://fixdown 4K'|DO|dH
private void fixDown(int k) { ZmP1C`>
int j; o{g@Nk'f
while ((j = k << 1) <= size) { VLx T"]f
if (j < size %26amp;%26amp; queue[j] j++; iz(m3k:w
if (queue[k]>queue[j]) file://不用交换 %|bN@@
break; 7_7xL(F/
SortUtil.swap(queue,j,k); 9JXhHAxD
k = j; 30BR0C
} > XZg@?Iw
} ]%||KC!O
private void fixUp(int k) { +>^[W~[2
while (k > 1) { Ga?UHw~
int j = k >> 1; 9QZ}Hn`p
if (queue[j]>queue[k]) $Uy#/MX
break; Iw*C*%}[Z
SortUtil.swap(queue,j,k); e00RT1L
k = j; Z{ %Uw;d
} JkJhfFV
} > `0| X
yq!CWXZ2
} ~6MMErSj
(w}r7`n
} qjzZ}
,A^L=+
SortUtil： '&/(oJ;O~
~V!EtZG$
package org.rut.util.algorithm; ud.poh~|
ItMl4P`|
import org.rut.util.algorithm.support.BubbleSort; .^BWR
import org.rut.util.algorithm.support.HeapSort; Y0rf9
import org.rut.util.algorithm.support.ImprovedMergeSort; fo*!a$)
import org.rut.util.algorithm.support.ImprovedQuickSort; Fr<Pe&dn
import org.rut.util.algorithm.support.InsertSort; 0:HC;J
import org.rut.util.algorithm.support.MergeSort; <kROH0+
import org.rut.util.algorithm.support.QuickSort; D. 77WjwQ
import org.rut.util.algorithm.support.SelectionSort; F6~b#Jz&i
import org.rut.util.algorithm.support.ShellSort; rT o%=0P
2k%Bl+I
/** FV`3,NFk
* @author treeroot Q4#\{" N!
* @since 2006-2-2 DCz\TwzU
* @version 1.0 IM$'J
*/ ER/\ +Z#Z
public class SortUtil { nIG[{gGX
public final static int INSERT = 1; FyQOa)5
public final static int BUBBLE = 2; So0`c,D
public final static int SELECTION = 3; >h|UCJ1 `
public final static int SHELL = 4; {|G&W^`
public final static int QUICK = 5; //VG1@vaVX
public final static int IMPROVED_QUICK = 6; "sC$%D<oc
public final static int MERGE = 7; (2n3exx
public final static int IMPROVED_MERGE = 8; t!NrB X
public final static int HEAP = 9; qdKh6{
AX/=}G
public static void sort(int[] data) { q=T<^Tk#e
sort(data, IMPROVED_QUICK); jY1^+y{
} 4mki&\lw`
private static String[] name={ Z?5,cI[6#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $[WN[J
}; Ufyxw5u5F
Z?vY3)
private static Sort[] impl=new Sort[]{ FI80vV7
new InsertSort(), &pa)Ee>
new BubbleSort(), I #Arr#%
new SelectionSort(), ag|9$
new ShellSort(), L2:oZ&:u`J
new QuickSort(), e,PQ)1
new ImprovedQuickSort(), h}Fu"zK
new MergeSort(), Yk(NZ3O
new ImprovedMergeSort(), ;Of?fe5:
new HeapSort() Q&\ZC?y4
}; lsTe*Od
MZgmv
public static String toString(int algorithm){ &Z#Vw.7U
return name[algorithm-1]; 8Xt=eL/P
} j(wY/Hl
"Wzij&WkQ
public static void sort(int[] data, int algorithm) { fSm?27_
impl[algorithm-1].sort(data); F>hVrUD8
} _Eet2;9
C`=`Ce~|d
public static interface Sort { B'<O)"1w
public void sort(int[] data); c~Q`{2%+
} O:5ldI
rElG7[+)p
public static void swap(int[] data, int i, int j) { F5b]/;|
int temp = data; LGdf_M-f
data = data[j]; 0~LnnDN
data[j] = temp; &q kl*#]
} bYRQI=gW':
} 0ll,V