[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; hD:$Sv/H
} SrVJ Q~:>
int i1=l; 3%W R
int i2=mid+1; "sf]I[a
for(int cur=l;cur<=r;cur++){ {6yiD
if(i1==mid+1) 3[L)q2;}$N
data[cur]=temp[i2++]; A,T3%TE
else if(i2>r) YbrsXp"
data[cur]=temp[i1++]; z;_d?S<*m
else if(temp[i1] data[cur]=temp[i1++]; 3Yd)Fm
else T?+xx^wYk
data[cur]=temp[i2++]; 2Xm\;7
} m{bw(+r
} t3 q0|S
Iz#h:O
} WBA0! g98
;ml;{<jI
改进后的归并排序: 9*%Uoy:
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package org.rut.util.algorithm.support; B%L0g.D"
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import org.rut.util.algorithm.SortUtil; ;q&>cnLDR
k.DDfuKN
/** :LL>C)(f
* @author treeroot he/UvMu
* @since 2006-2-2 +x!V;H(
* @version 1.0 $zTjh~ 9
*/ {}ZQK
public class ImprovedMergeSort implements SortUtil.Sort { o(. PxcD
P(W7,GD,k
private static final int THRESHOLD = 10; }XiS:
:G|Jcl=r
/* $o`N%]
* (non-Javadoc) :CN,I!:
* j+n1k^jC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )ll`F7B-
*/ @>J4K#"
public void sort(int[] data) { :Q\b$=,:
int[] temp=new int[data.length]; &Q^M[X
mergeSort(data,temp,0,data.length-1); N"b>]Ab] ;
} )jp#|#h
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private void mergeSort(int[] data, int[] temp, int l, int r) { tWi@_Rlx;
int i, j, k; v!ULErs
int mid = (l + r) / 2; !9i,V{$c`"
if (l == r) n-dO |3,
return; KX9+*YY,
if ((mid - l) >= THRESHOLD) Q^8C*ekfg!
mergeSort(data, temp, l, mid); 5isejR{r
else un[Z$moN"
insertSort(data, l, mid - l + 1); :JSOj@s
if ((r - mid) > THRESHOLD) {vAq08
mergeSort(data, temp, mid + 1, r); H~@E&qd
else vcAs!ls+
insertSort(data, mid + 1, r - mid); X LPO_tD
fAfsKO*
for (i = l; i <= mid; i++) { gQ*0Mk
temp = data; UGEC_
} 8@qYzSx[
for (j = 1; j <= r - mid; j++) { v\t$. _at
temp[r - j + 1] = data[j + mid]; B5!$5Qc
} 0?ZJJdI3
int a = temp[l]; HW{osav9
int b = temp[r]; jR\T\r4
for (i = l, j = r, k = l; k <= r; k++) { dapQ5JT/
if (a < b) { RNiZ2:
data[k] = temp[i++]; u|=_!$8
a = temp; ZYrXav<
} else { (M6B$:
data[k] = temp[j--]; y`=A$>A
b = temp[j]; &D uvy#J
} .-[UHO05^8
} f>5{SoM
} ]E88zWDY`
Se*GR"Z+
/** W=o90TwbN
* @param data %?_pSH}$!
* @param l gec<5Ewg
* @param i |Z$heYP:w
*/ s*:J=+D]G
private void insertSort(int[] data, int start, int len) { ;58l_ue
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mTW0_!.
} 3*3WO,9
} _{KQQ5k\
} qp^O\>c
} 7Cx%G/(
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堆排序： c{6!}0Q4
s<xD$K~rM
package org.rut.util.algorithm.support; Ej ip%m
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import org.rut.util.algorithm.SortUtil; %.BbPR7?h
0CQ\e1S,#
/** GNqw]@'Yf
* @author treeroot s6rdQI]
* @since 2006-2-2 r@H<@Vuc
* @version 1.0 x;l\#x/<
*/ *n N;!*J
public class HeapSort implements SortUtil.Sort{ UC;_}>
7Nw7a;h
/* (non-Javadoc) ioIUIp+B~u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *]p]mzc
*/ # h]m8
public void sort(int[] data) { SY["dcx+
MaxHeap h=new MaxHeap(); Z+=WgEu1
h.init(data); pN&5vu30
for(int i=0;i h.remove(); OOGqtA;
System.arraycopy(h.queue,1,data,0,data.length); C+cSy'VIK!
} d3+pS\&IX?
^UZEdR;
private static class MaxHeap{ C#`eN{%.YT
*{P"u(K
void init(int[] data){ Q_euNoA0
this.queue=new int[data.length+1]; 0iinr:=u
for(int i=0;i queue[++size]=data; '%yWz)P
fixUp(size); }>=k!l{
} 07DpvhDQ
} Bl2y~fCA
h-=3b
private int size=0; M])Y|}wv8
ec[S?-
private int[] queue; 7@$Hua,GY
G)';ucs:,
public int get() { '`#2'MXG
return queue[1]; AKC';J
} )dbi
3<1Uq3Pa
public void remove() { lplEQ]J|
SortUtil.swap(queue,1,size--); V{p*N*
fixDown(1); r]sv50Fy
} b{=2#J-
file://fixdown (n05MwKu\
private void fixDown(int k) { '^'vafs-/@
int j; U,yU-8z/
while ((j = k << 1) <= size) { 3XYCtp8
if (j < size %26amp;%26amp; queue[j] j++; `@b+'L
if (queue[k]>queue[j]) file://不用交换 qYBoo]}a
break; ^]3Y11sI
SortUtil.swap(queue,j,k); ^\Nsx)Y;
k = j; G4vXPx%a8
} ,o& &d.
} \Y_2Z/
private void fixUp(int k) { WLd{+y5#
while (k > 1) { O6NgI2[O
int j = k >> 1; .$y}}/{j?[
if (queue[j]>queue[k]) E%t_17,=j
break; &[f.;1+C
SortUtil.swap(queue,j,k); cJd~UQ<k
k = j; \/g.`Pe
} `9n%Dy<
} Fd*)1FQKT
x+x6F
} ce{(5IC
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} wN\%b}pp
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SortUtil： sy=M#WGS
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package org.rut.util.algorithm; ZdJwy%
R5c Ya
import org.rut.util.algorithm.support.BubbleSort; ,f8<s-y4Sg
import org.rut.util.algorithm.support.HeapSort; #;sUAR?]
import org.rut.util.algorithm.support.ImprovedMergeSort; tfW/Mf
import org.rut.util.algorithm.support.ImprovedQuickSort; mD{<Lp=
import org.rut.util.algorithm.support.InsertSort; _\hZX|:]
import org.rut.util.algorithm.support.MergeSort; YhYcqE8
import org.rut.util.algorithm.support.QuickSort; ]fvU}4!
import org.rut.util.algorithm.support.SelectionSort; mr dG-t(k
import org.rut.util.algorithm.support.ShellSort; +e?mKLw14
23 j{bK
/** /4J2F9:f
* @author treeroot qP{S!Z(
* @since 2006-2-2 7cV9xIe^
* @version 1.0 ,e{(r0
*/ ?K%&N99c!
public class SortUtil { P0NGjS|Z{
public final static int INSERT = 1; @RGVcfCG)
public final static int BUBBLE = 2; 1ThONrxu
public final static int SELECTION = 3; >Y=HP&A<
public final static int SHELL = 4; )nmLgsg
public final static int QUICK = 5; bfy `UZr
public final static int IMPROVED_QUICK = 6; hfT HP
public final static int MERGE = 7; D%GB2-j R
public final static int IMPROVED_MERGE = 8; F4'g}yOLd
public final static int HEAP = 9; 8 #fzL7
$Y.Z>I;
public static void sort(int[] data) { 2g5Ft
sort(data, IMPROVED_QUICK); |M]#D0v
} B7r={P!0
private static String[] name={ r \+&{EEG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,_;+H*H>"
}; sk !92mQ
Z0*Lm+d9z
private static Sort[] impl=new Sort[]{ 37GJ}%Qs
new InsertSort(), rI34K~ P
new BubbleSort(), RU&,z3LEb
new SelectionSort(), y+xw`gR:
new ShellSort(), Ah:!
new QuickSort(), i bAZ*I
new ImprovedQuickSort(), td!WgL,m
new MergeSort(), q] g'rO'
new ImprovedMergeSort(), v Yt-Nx
new HeapSort() <Y~?G:v6+
}; BzBij^h
#U45H.Rz
public static String toString(int algorithm){ 1,@-y#V_
return name[algorithm-1]; xxxM
} HDqPqrWm
Q79& Q04XN
public static void sort(int[] data, int algorithm) { Zwy8SD'L
impl[algorithm-1].sort(data); [DrG;k?
} sute%6yM
_~!*|<A_
public static interface Sort { 3`sM/BoA
public void sort(int[] data); vlYDhjZk#
} |O0=Q,<m
W+k`^A|@
public static void swap(int[] data, int i, int j) { ZqKUz5M4
int temp = data; <hlH@[7!
data = data[j]; iC-WQkQY
data[j] = temp; $nN`K*%
} }p-<+sFo
} |jB]5ciT