[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; vG:,oB}
} ~h|L;E"
int i1=l; vB4qJ{f
int i2=mid+1; 8#-}3~l[
for(int cur=l;cur<=r;cur++){ 74wa
if(i1==mid+1) rVmO/Y#Hx$
data[cur]=temp[i2++]; vbJMgdHFR
else if(i2>r) Gl1$W=pR:
data[cur]=temp[i1++]; sM[c\Z]
else if(temp[i1] data[cur]=temp[i1++]; "+Rm4_
else s#49pDN
data[cur]=temp[i2++]; 1h{_v!X
} !\v3bOi&
} mt7:`-
Hb4rpAeP
} @Q5^Q'!
{ )K(}~VD
改进后的归并排序: H-lRgJdc
i?9Lf
package org.rut.util.algorithm.support; N?:S?p9R@
1-<Xi-=^{t
import org.rut.util.algorithm.SortUtil; AlV2tffY^
tJ3s#q6
/** (avaTUMOqy
* @author treeroot /2I("x]
* @since 2006-2-2 =B2=UF
* @version 1.0 IC~D?c0H:
*/ >48Y-w
public class ImprovedMergeSort implements SortUtil.Sort { ' 'N@ <|
d~%Rnic6*
private static final int THRESHOLD = 10; #kEdf0
qI:wm=
/* so?1lG
* (non-Javadoc) D1 z3E;:
* ]T`qPIf;yJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L}+!<Ug
*/ 9G9lSj5>
public void sort(int[] data) { FT6cOMu
int[] temp=new int[data.length]; t&]IgF
mergeSort(data,temp,0,data.length-1); !h\3cs`QU
} ;2}Gqh)Yr
DTY=k
private void mergeSort(int[] data, int[] temp, int l, int r) { DJ.Ct4
int i, j, k; up?8Pq*
int mid = (l + r) / 2; <j'#mUzd
if (l == r) (;3jmdJhK
return; Fk:(%ci
if ((mid - l) >= THRESHOLD) + h&V;
mergeSort(data, temp, l, mid); zb(u?U
else ORTM[cL
insertSort(data, l, mid - l + 1); tz{]H9
if ((r - mid) > THRESHOLD) a@./e @p
mergeSort(data, temp, mid + 1, r); ~+Y;jAdU
else Ho/5e*X
insertSort(data, mid + 1, r - mid); o2L/8q.
5+r#]^eQY-
for (i = l; i <= mid; i++) { RzkJS9)m
temp = data; ?/~1z*XUW
} +?p ;,Z%5
for (j = 1; j <= r - mid; j++) { :?TV6M
temp[r - j + 1] = data[j + mid]; Q=[&~^Y)
} qJ!xhf1
int a = temp[l]; j:#[voo7
int b = temp[r]; Z.<B>MD8^
for (i = l, j = r, k = l; k <= r; k++) { >jcNo3S
if (a < b) { Xo,BuK&G
data[k] = temp[i++]; S=Zjdbd
a = temp; = FQH
} else { Hd:ZE::Q'#
data[k] = temp[j--]; ^t*BWJxPC
b = temp[j]; "o1/gV
} P*}Oi7Z
} "^\4xI
} YG%Zw
wo/H:3^N
/** 1+]e?
* @param data hOV+}P6
* @param l 3,GSBiK3}
* @param i 5VI'hxU4Qg
*/ +XQ6KG&
private void insertSort(int[] data, int start, int len) { sU>*S$X8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S7V;sR"V2
} g+f{I'j
} r6A7}v
} ve$P=ZuM
} X(8]9
#2}S83 k
堆排序： 7>.^GD
-n6C~Yx
package org.rut.util.algorithm.support; Jyd%!v
1{A4_/R
import org.rut.util.algorithm.SortUtil; YpiSH(70`
'h:4 Fzo<
/** sh0O~%]g
* @author treeroot 9Y7 tI3
* @since 2006-2-2 ALFw[1X
* @version 1.0 c;j]/R$i
*/ C?zC|0
public class HeapSort implements SortUtil.Sort{ @x)z" )>
-wY6da*.W
/* (non-Javadoc) X[VQ 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tJ 6:$dh
*/ /GEqU^ B
public void sort(int[] data) { JAgec`T%
MaxHeap h=new MaxHeap(); /6>2,S8Ar
h.init(data); t]Vw`z%G
for(int i=0;i h.remove(); J?%Z7&/M>
System.arraycopy(h.queue,1,data,0,data.length); g|W~0A@D
} Bs^W0K$uBO
uu(.,11`
private static class MaxHeap{ D@mDhhK_
$?0<rvGJ
void init(int[] data){ %!WQ;(
this.queue=new int[data.length+1]; %e3lb<sv6
for(int i=0;i queue[++size]=data; 2f4*r^
fixUp(size); SMnbI.0
} J)*y1
} o8bVz2E
MYLq2g\
private int size=0; puDy&T
~aBALD0D;
private int[] queue; a "8/y4Y
#*?a"
public int get() { yBeSvsm
return queue[1]; E-l>z%
} ?"J5~_U.
,~c:P>v=
public void remove() { ?9/%K45
SortUtil.swap(queue,1,size--); V[CS{Hy'
fixDown(1); Yr"G)i~"Y
} h}.0Ne
file://fixdown GQT|T0>Ro
private void fixDown(int k) { }KJ/WyYW
int j; XYf;72*
while ((j = k << 1) <= size) { ]l`?"X|^
if (j < size %26amp;%26amp; queue[j] j++; J/=b1{d"n
if (queue[k]>queue[j]) file://不用交换 D{\hPv
break; `[[ A7
SortUtil.swap(queue,j,k); aZ- )w
k = j; v"\Q/5p
} =f?|f
} F~z4T/TN%G
private void fixUp(int k) { JoIffI?{(D
while (k > 1) { fk;39$[
int j = k >> 1; kx*=1AfU+Y
if (queue[j]>queue[k]) {-tCLkE 3
break; HP"5*C5D
SortUtil.swap(queue,j,k); `G6Nk@9.
k = j; `UGHk*DL)
} pv;}Sv$ ]-
} `TBau:ElI
LeXuTd
} E*i <P
px".pYr0
} |'Z6M];8t
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SortUtil： z'XFwk
|?i-y3N
package org.rut.util.algorithm; WR%x4\,d#
S3A OT
import org.rut.util.algorithm.support.BubbleSort; tFO86 !ln
import org.rut.util.algorithm.support.HeapSort; c"H*9u:
import org.rut.util.algorithm.support.ImprovedMergeSort; rK9X68)
import org.rut.util.algorithm.support.ImprovedQuickSort; xOp8[6Ga'
import org.rut.util.algorithm.support.InsertSort; ;gP@d`s
import org.rut.util.algorithm.support.MergeSort; $x)C_WZj?
import org.rut.util.algorithm.support.QuickSort; %\Z{~(&-v
import org.rut.util.algorithm.support.SelectionSort; OxZw;yD
import org.rut.util.algorithm.support.ShellSort; |Rf4^vN
Kp!sn,:
/** j:0(=H!#
* @author treeroot 8fY1~\G:\
* @since 2006-2-2 $2~I-[
* @version 1.0 =I-SQI8
*/ YQ:FBj
public class SortUtil { ` zeZ7:
public final static int INSERT = 1; 6av]LYK
public final static int BUBBLE = 2; * _)xlpy
public final static int SELECTION = 3; 8*k#T\
public final static int SHELL = 4; 7`9J.L&,;
public final static int QUICK = 5; {=pRU_-^
public final static int IMPROVED_QUICK = 6; }'U"HHv
public final static int MERGE = 7; xPl+ rsU
public final static int IMPROVED_MERGE = 8; A'^y+42jY
public final static int HEAP = 9; $<xa "aN!
!yI , ~`Z
public static void sort(int[] data) { p(g0+.?`~
sort(data, IMPROVED_QUICK); +] s"*'V$
} #T &z`
private static String[] name={ n}Pz:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cy%JJ)sf
}; ;nW#Dn9
@8a1a3_F
private static Sort[] impl=new Sort[]{ >AX&PMb`
new InsertSort(), 3GqvL_
new BubbleSort(), //9Ro"
new SelectionSort(), ;4tmnC>OnA
new ShellSort(), ]k &Y )
new QuickSort(), \D}K{P
new ImprovedQuickSort(), *.nC'$-2r
new MergeSort(), ^LO=&Cq
new ImprovedMergeSort(), mF7T=pl
new HeapSort() kqxX!
}; *8ykE
p^S]O\;M7
public static String toString(int algorithm){ P4@<`Eb
return name[algorithm-1]; tu{y
} G$FNofQx
MDI[TNYG
public static void sort(int[] data, int algorithm) { ;[9WB<t
impl[algorithm-1].sort(data); o0t/
} .b'hVOs{
0kEzi
public static interface Sort { j<[+vrj
public void sort(int[] data); $C@v
} :wtr{,9rZ
f~nAJ+m=
public static void swap(int[] data, int i, int j) { ^,F8 ha
int temp = data; 2\ 3}y(
data = data[j]; 0=]RG
data[j] = temp; a:nMW'!
} QQ*yQ\
} E07g^y"}i