[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; !|G(Yg7C
} \5><3*\
int i1=l; eE]hy'{d<
int i2=mid+1; j 6)Y
for(int cur=l;cur<=r;cur++){ uB.-t^@
if(i1==mid+1) Ff4*IOZ}(
data[cur]=temp[i2++]; -X1X)0v$
else if(i2>r) &%C4Ugo
data[cur]=temp[i1++]; !K0JV|-?t
else if(temp[i1] data[cur]=temp[i1++]; F[`ZqW
else +a+`Z>
data[cur]=temp[i2++]; u<tk G B
} )g1a'G
} TH1B#Y#<J
}IkQA#4$
} edC4BHE
h{iEZ#
改进后的归并排序: m7|RD]q&
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package org.rut.util.algorithm.support; ~,gXaw
2j&@p>
import org.rut.util.algorithm.SortUtil; /CX VLl8~
m}Y0xV9
/** P`SnavQBt
* @author treeroot 15H6:_+=0
* @since 2006-2-2 WQePSU
* @version 1.0 -V<t-}h.
*/ 3.R#&Zxt
public class ImprovedMergeSort implements SortUtil.Sort { w7kJg'X/6
Oe]&(
private static final int THRESHOLD = 10; JhK/']R
~=n#}{/
/* \F6LZZ2Lv
* (non-Javadoc) QB{rVI>mI!
* %}Q&1P=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) udqS'g&
*/ VHUW]8We
public void sort(int[] data) { xK%=
int[] temp=new int[data.length]; +Ezgn/bS&
mergeSort(data,temp,0,data.length-1); CQg X=!q
} {U!uVQC'
%:C ]7gQ
private void mergeSort(int[] data, int[] temp, int l, int r) { mj,fp2D;%
int i, j, k; `TKD<&oL
int mid = (l + r) / 2; T=Z.U$
if (l == r) IO$z%r7
return; e(B9liXM
if ((mid - l) >= THRESHOLD) A7XnHPIw
mergeSort(data, temp, l, mid); W 0[N0c
else [bQj,PZ&
insertSort(data, l, mid - l + 1); Y}R}-+bD/
if ((r - mid) > THRESHOLD) c@m5~
mergeSort(data, temp, mid + 1, r); q 2?X"!
else JcO08n
insertSort(data, mid + 1, r - mid); |FR3w0o
)hKS0`$|
for (i = l; i <= mid; i++) { [Gr*,nVvB
temp = data; Y;J*4k]
} jdqj=Yc
for (j = 1; j <= r - mid; j++) { V~{ _3YY
temp[r - j + 1] = data[j + mid]; @Cq? :o<
} kUHE\L.Y]
int a = temp[l]; uV6g[J
int b = temp[r]; D@YP7
for (i = l, j = r, k = l; k <= r; k++) { r8MZvm2
if (a < b) { :K.4n
data[k] = temp[i++]; D$k8^Vs
a = temp; eARk QV
} else { tB(4Eq \
data[k] = temp[j--]; #TJk-1XM*q
b = temp[j]; /M0/-pV9
} @)YY\l#
} 7LZ^QC
} F 8yF
WPuz]Ty
/** E;\M1(\u
* @param data Ps[$.h
* @param l mPZGA\
* @param i @ CsV]97`
*/ Sq]pQ8
private void insertSort(int[] data, int start, int len) { ;I6s-moq_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t@zdmy
} >O`l8tM
} h#YD~!aJ
} 3-Bl
} <EX7WA
my\&hCE
堆排序： n[+'OU[
6Y*;{\Rd
package org.rut.util.algorithm.support; n$+M%}/f
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import org.rut.util.algorithm.SortUtil; +",S2Qmo
&K%aw
/** U..<iNQE5
* @author treeroot P~$<X
* @since 2006-2-2 .jg0a
* @version 1.0 ?H|T&66
*/ 1TJ0D_,
public class HeapSort implements SortUtil.Sort{ mO rWJ~=
u</8w&!
/* (non-Javadoc) :J_oj:0r"f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %HuyK
*/ F3E[wdT
public void sort(int[] data) { m)>&ZIXa
MaxHeap h=new MaxHeap(); y=N"=Z
h.init(data); `^F: -
for(int i=0;i h.remove(); _2Zp1h,
System.arraycopy(h.queue,1,data,0,data.length); |H)cuZ
} c$M%G)P
/Bv#) -5
private static class MaxHeap{ y.a]r7
59 2;W-y
void init(int[] data){ rGwIcx(%
this.queue=new int[data.length+1]; >l1r,/\\
for(int i=0;i queue[++size]=data; 6vs3O
fixUp(size); `aSM8C\
} Y*YFB|f?
} eD#XDK
[I+9dSM1t
private int size=0; 'ig, ATY
_9If/RD
private int[] queue; j'rS&BIG
dSK0h(8
public int get() { u=K2Q4
return queue[1]; ~UMOT!4}3
} t8J/\f=
RVM&4#E
public void remove() { 7!4V>O8@
SortUtil.swap(queue,1,size--); >.%4~\U
fixDown(1); Epjff@7A
} @PkJY
file://fixdown vs9?+3
private void fixDown(int k) { Lk,+Tfk"
int j; MgJ5B(c
while ((j = k << 1) <= size) { Q+[ .Y&
if (j < size %26amp;%26amp; queue[j] j++; &y.dmW
if (queue[k]>queue[j]) file://不用交换 a-0cN 9
break; C8b''9t.
SortUtil.swap(queue,j,k); ?[1SiJT
k = j; ?T'][q
} 2W$lQ;iO
} SG]K
private void fixUp(int k) { WStnzVe
while (k > 1) { T 1Cs>#)
int j = k >> 1; dk5|@?pe
if (queue[j]>queue[k]) !k&)EWP?
break; ! q6hC
SortUtil.swap(queue,j,k); `lCuU~~ag
k = j; I0w%8bs
} 9C}qVoNu
} }[=YU%[o:
ej[Su
} W'$kZ/%[
\9m*(_Qf
} ?Myh7
O.\h'3C
SortUtil： 7sV/_3H+
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package org.rut.util.algorithm; Os&1..$Nb
zY APf &5
import org.rut.util.algorithm.support.BubbleSort; %J P!{mqj
import org.rut.util.algorithm.support.HeapSort; Da,Tav%b
import org.rut.util.algorithm.support.ImprovedMergeSort; c~Kc7}I
import org.rut.util.algorithm.support.ImprovedQuickSort; 7`Du5>b8
import org.rut.util.algorithm.support.InsertSort; _/x&<,3
import org.rut.util.algorithm.support.MergeSort; 5P+YK\~
import org.rut.util.algorithm.support.QuickSort; 'EX4.h a5
import org.rut.util.algorithm.support.SelectionSort; tY_5Pz(@
import org.rut.util.algorithm.support.ShellSort; UzQ$B>f
r_o<SH
/** f_<Y\
* @author treeroot |rPAC![=
* @since 2006-2-2 `BT^a =5
* @version 1.0 )U98
*/ >4)g4~'n!
public class SortUtil { Rt4di^v
public final static int INSERT = 1; KTmaglgp
public final static int BUBBLE = 2; CT"Fk'B'
public final static int SELECTION = 3; z,Xk\@
public final static int SHELL = 4; 5si}i'in
public final static int QUICK = 5; 7'.s7& '7
public final static int IMPROVED_QUICK = 6; %C*^:\y
public final static int MERGE = 7; htHv&
public final static int IMPROVED_MERGE = 8; $KQ,}I
public final static int HEAP = 9; y^s1t2]%
ntHT
public static void sort(int[] data) { " i`8l.Lc
sort(data, IMPROVED_QUICK); ^ KOzCLC
} 9q|7<raS
private static String[] name={ FdxsUDL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [x_s/"Md;
}; rm|7 [mK
yYX :huw
private static Sort[] impl=new Sort[]{ <Cq"| A
new InsertSort(), Z<]VTo
new BubbleSort(), ua#K>sur.
new SelectionSort(), `]>on`n?
new ShellSort(), VO-784I
new QuickSort(), qZsnd7o{l.
new ImprovedQuickSort(), chLeq
new MergeSort(), w%u5<
new ImprovedMergeSort(), n-OWwev)
new HeapSort() n~%}Z[5D
}; <%?uYCD
Bbs 0v6&,
public static String toString(int algorithm){ ^x3EotQ\
return name[algorithm-1]; z93nYY$`Y
} s=/^lOOO
rw*M&qg!z
public static void sort(int[] data, int algorithm) { t-EV h~D1p
impl[algorithm-1].sort(data); B$7[8h
} -tP.S1D
|[WL2<
public static interface Sort { Q X):T#^V
public void sort(int[] data); 04\Ta
} ..$>7y}
a7 )@BzF#
public static void swap(int[] data, int i, int j) { R0IF'
int temp = data; Zd XKI{b
data = data[j]; nKu(XgFv
data[j] = temp; %8<2>
} s01$fFJgO
} p">WK<N