[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; V~do6[(
} 5gb:,+
int i1=l; #)O^aac29
int i2=mid+1; >B;KpO"+m
for(int cur=l;cur<=r;cur++){ FW{K[km^P
if(i1==mid+1) l\|sHn/
data[cur]=temp[i2++]; Fqh./@o
else if(i2>r) v7%}ey[
data[cur]=temp[i1++]; PX`xr1o
else if(temp[i1] data[cur]=temp[i1++]; WuTkYiF
else (^E5y,H<g
data[cur]=temp[i2++]; "/Gw`^t
} 9mjJC
} SwM=?<
>P//]nn
} P!!O~P
@jrxbo;5
改进后的归并排序: .i^@v<+
m!=5Q S3Z
package org.rut.util.algorithm.support; KL$>j/qT
*kcc]*6@s
import org.rut.util.algorithm.SortUtil; WZh_z^rwn
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/** !YZKa-
* @author treeroot Gl[1K/,*
* @since 2006-2-2 .L]5,#2([
* @version 1.0 ;' H\s
*/ M0OIcMTv
public class ImprovedMergeSort implements SortUtil.Sort { VN'\c3;
r3KNRr@
private static final int THRESHOLD = 10; ~$hR:I1
C%CgWO`Xj
/* xvomn`X1
* (non-Javadoc) mIqm/5
* i ^2A:6}?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |f!J-H)
*/ 8si{|*;hL
public void sort(int[] data) { WWo"De@
int[] temp=new int[data.length]; uZ'Z-!=CL
mergeSort(data,temp,0,data.length-1); dDD5OnWmJ
} N Z,}v3
Ih4$MG6QC
private void mergeSort(int[] data, int[] temp, int l, int r) { .w'b%M
int i, j, k; 0,Ib74N'w
int mid = (l + r) / 2; MUGoW;}v)
if (l == r) S\Le;,5Z
return; =1'WZp}D5
if ((mid - l) >= THRESHOLD) .D\oKhV(
mergeSort(data, temp, l, mid); yPs6_Qo!p
else YMU""/(
insertSort(data, l, mid - l + 1); '>n&3`r5
if ((r - mid) > THRESHOLD) -Dy<B
mergeSort(data, temp, mid + 1, r); S8v?H|rm
else MI(;0
insertSort(data, mid + 1, r - mid); \okv}x^L=Z
#y[omla8
for (i = l; i <= mid; i++) { Z @ef2y;
temp = data; 7YK6e
} c~;VvYu
for (j = 1; j <= r - mid; j++) { ,^Q~w b!{
temp[r - j + 1] = data[j + mid]; SJc~E$5<
} vqO#Z
int a = temp[l]; |@yYM-;6
int b = temp[r]; r>TOJVT&]
for (i = l, j = r, k = l; k <= r; k++) { pV;0Hcy
if (a < b) { 'mTY56Yq
data[k] = temp[i++]; 4VwMl)8ic
a = temp; ,J-|.ER->
} else { );6f8H@G
data[k] = temp[j--]; r<Cr)%z!
b = temp[j]; 4cM0f,nc+
} a?8)47)
} qSG0TWD!pq
} ,Z _@]D@
jm@M"b'{
/** M0\gp@Fe
* @param data p@uHzu7
* @param l hsS&|7Pt
* @param i A9u>bWIE7
*/ SK^(7Ws~0
private void insertSort(int[] data, int start, int len) { '@h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [rK`BnJX
} QV:> x#=V
} wvxz:~M
} !G0Mg; ,
} 8>6<GdGL<n
Ql l{;A
堆排序： #\n*Qg4p
Bp5ra9*5+~
package org.rut.util.algorithm.support; ;v2eAe@7
?eX/vqk
import org.rut.util.algorithm.SortUtil; s@7hoU-+
~ss6yQ$
/** t8h*SHD9
* @author treeroot cSV&p|
* @since 2006-2-2 q>>1?hzA
* @version 1.0 ha=2isq
*/ z},\1^[
public class HeapSort implements SortUtil.Sort{ {z0iWY2Xw
J`GL_@$q
/* (non-Javadoc) |Rkw/5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;DYS1vGo
*/ RJerx:]
public void sort(int[] data) { V@-Q&K#
MaxHeap h=new MaxHeap(); !bYVLFp=\_
h.init(data); K[OOI~"C
for(int i=0;i h.remove(); R#;xBBt8
System.arraycopy(h.queue,1,data,0,data.length); B>!mD{N
} @P75f5p}<
Qg(;>ops
private static class MaxHeap{ tUc<ExvP,
S\A0gOL^
void init(int[] data){ rXD:^wUSc
this.queue=new int[data.length+1]; NQ 6oyg@&
for(int i=0;i queue[++size]=data; ?#(LH\$l_
fixUp(size); WlvT&W
} nYZ6'Iwi'
} Xnjl {`
(&/4wI^M
private int size=0; 4}/gV)
_",(!(
private int[] queue; tm=,x~
3I~.'>Pd
public int get() { $9Bzq_!
return queue[1]; pY )x&uM!
} 0LL0\ly]
O(8CrKYY
public void remove() { wyB]!4yy,
SortUtil.swap(queue,1,size--); ^IuhHP
fixDown(1); -#T%*
} Nr2,m"R{
file://fixdown "D_:`@V(
private void fixDown(int k) { *(q?O_3,b
int j; hZ e{Ri
while ((j = k << 1) <= size) { ROQ]sQpk
if (j < size %26amp;%26amp; queue[j] j++; (E00T`@t0i
if (queue[k]>queue[j]) file://不用交换 sZ&|omN
break; B47I?~{
SortUtil.swap(queue,j,k); wW\@^5
k = j; [5p9p1@u{C
} *.>@
} U-1UWq
private void fixUp(int k) { |w*s:p
while (k > 1) { zM&ro,W
int j = k >> 1; K\U`gTGc
if (queue[j]>queue[k]) ]j/= x2p
break; ,Owk;MV@
SortUtil.swap(queue,j,k); ,s3|
k = j; JnK<:]LcK
} m6BUKX\m
} Sj(>G;
0/f|ZH ~!
} -%fj-Y7y
_yN5sLLyb
} '{ =F/q
N)Q_z9b=
SortUtil： n8;L_43U
#`|Nm3b
package org.rut.util.algorithm; }a5TY("d9H
@~ke=w6&pe
import org.rut.util.algorithm.support.BubbleSort; xtv%C
import org.rut.util.algorithm.support.HeapSort; RNB&!NC
import org.rut.util.algorithm.support.ImprovedMergeSort; ,S`n?.&& 7
import org.rut.util.algorithm.support.ImprovedQuickSort; )yig=nn
import org.rut.util.algorithm.support.InsertSort; =T2SJ)
import org.rut.util.algorithm.support.MergeSort; T>nH=
import org.rut.util.algorithm.support.QuickSort; _dk[k@5W{'
import org.rut.util.algorithm.support.SelectionSort; PsNrCe%e
import org.rut.util.algorithm.support.ShellSort; J{\Uw].|0
>>KI_$V
/** '1b8>L
* @author treeroot )JTQZ,f3]
* @since 2006-2-2 =bD.5,F)
* @version 1.0 8493Sw
*/ $nmt&lm
public class SortUtil { *> nOL
public final static int INSERT = 1; w"[T
public final static int BUBBLE = 2; M("sekL
public final static int SELECTION = 3; LhAW|];
public final static int SHELL = 4; G9okl9;od
public final static int QUICK = 5; \)uA:v
public final static int IMPROVED_QUICK = 6; JGvhw,g
public final static int MERGE = 7; W3UxFs]$
public final static int IMPROVED_MERGE = 8; |VaJ70\o
public final static int HEAP = 9; *l =f=
|X>'W"Mn
public static void sort(int[] data) { Rjq\$aY}%
sort(data, IMPROVED_QUICK); 9rz$c, Y(
} "!vY{9,
private static String[] name={ [5IbR9_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %eofG]VM<
}; ].J;8}
Gu$J;bXVj
private static Sort[] impl=new Sort[]{ H:hM(m0?q
new InsertSort(), yN`hW&K
new BubbleSort(), \`~YW<D
new SelectionSort(), E]n]_{BN]
new ShellSort(), |0}Xb|+
new QuickSort(), .+XK>jl+
new ImprovedQuickSort(), <FBH;}]
new MergeSort(), 0^V<,CAV
new ImprovedMergeSort(), .up[wt gN
new HeapSort() ?q4`&";{3
}; *j&\5|^V
u(1m#xr8$
public static String toString(int algorithm){ pm=O.)g4`
return name[algorithm-1]; XZ.D<T"
} m_Ed[h/I
{:"<E?+
public static void sort(int[] data, int algorithm) { 55.2UN
impl[algorithm-1].sort(data); dpS@:
} ?/MkH0[G=
+Eb-|dM
public static interface Sort { /f?;,CyI
public void sort(int[] data); +~G:z|k
} W^^0Rh_
%K3U`6kHcd
public static void swap(int[] data, int i, int j) { ` ~m/
int temp = data; z6M5'$\y
data = data[j]; Lct_6?
data[j] = temp; t*Ro2QZ
} 'q;MhnU+
} Z;~%!