[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; D-/aS5wM
} Mohy;#8Wk
int i1=l; e' `xU
int i2=mid+1; dXe. 5XC
for(int cur=l;cur<=r;cur++){ qlUw;{;p
if(i1==mid+1) 7jb{E+DrG
data[cur]=temp[i2++]; BBub'
else if(i2>r) Qe~2'Hw#9
data[cur]=temp[i1++]; L?@TF;
else if(temp[i1] data[cur]=temp[i1++]; s1[_Pk;!
else is3nLm(
data[cur]=temp[i2++]; cI5*`LML1
} #&@qmps(T
} O$><E8q
t*fG;YOg
} `q ;79t
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改进后的归并排序: )P{I<TBI;
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package org.rut.util.algorithm.support; zEQ<Q\"1
u#+p6%?k
import org.rut.util.algorithm.SortUtil; [ imC21U
,sAN,?eG~
/** "4{_amgm&<
* @author treeroot A~vZ}?*M
* @since 2006-2-2 LNp%]*h
* @version 1.0 FmALmS
*/ ,|: a7b]
public class ImprovedMergeSort implements SortUtil.Sort { OFJ T
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private static final int THRESHOLD = 10; /nK)esB1L
!Q,A#N(
/* 0d-w<lg9
* (non-Javadoc) b}G4eXkuj
* 2u[:3K-@,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xHml"Y1
*/ 62BJ;/ ]
public void sort(int[] data) { }OeEv@^
int[] temp=new int[data.length]; gyW*-:C
mergeSort(data,temp,0,data.length-1); =5P_xQx
} h_ ^,|@C"
8F$b/Z
private void mergeSort(int[] data, int[] temp, int l, int r) { q\qV~G`
int i, j, k; #\+TKK
int mid = (l + r) / 2; *&j)"hX
if (l == r) \ B~9Ue!
return; zS Yh ?NB5
if ((mid - l) >= THRESHOLD) &FWPb#
mergeSort(data, temp, l, mid); _v=@MOI/J
else qAH@)}
insertSort(data, l, mid - l + 1); HQ%-e5Q
if ((r - mid) > THRESHOLD) Z\=].[,w4
mergeSort(data, temp, mid + 1, r); ;Yrg4/Ipa
else Mk=;UBb$X
insertSort(data, mid + 1, r - mid); L3Leb%,!
H=vrF-#
for (i = l; i <= mid; i++) { DPfP)J:~
temp = data; nL}bCX{
} mT.p-C
for (j = 1; j <= r - mid; j++) { IJ^KYho
temp[r - j + 1] = data[j + mid]; <v?9:}
} >4:W:;R
int a = temp[l]; _tR%7%3*
int b = temp[r]; "y>\ mC
for (i = l, j = r, k = l; k <= r; k++) { 5Wj+ey^^w
if (a < b) { ]MkZ1~f7
data[k] = temp[i++]; '676\2.
a = temp; #@,39!;,:O
} else { 8Ek<J+&|I
data[k] = temp[j--]; 29"eu#-Qj
b = temp[j]; 6 ^X$;
} {~yj]+Im
} QdKxuG
} ]1 #&J(
NF1e>O:a<
/** y2V9!
* @param data $]CZ]EWts
* @param l Y&xmy|O#
* @param i ce{GpmW
*/ /&=E=S6
private void insertSort(int[] data, int start, int len) { h<.G^c)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6Q,-ZM=Z_p
} #Zpp*S55
} 8<$6ufvOv
} j380=?7
} SGW2'
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堆排序： w,NK]<dU@
/"?y @;Y~
package org.rut.util.algorithm.support; T0WB
?;.j)
import org.rut.util.algorithm.SortUtil; V *=To
X75>C<
/** uROt h_/
* @author treeroot - Z"w
* @since 2006-2-2 oC>QJ(o,8
* @version 1.0 (Q !4\Gy
*/ <@n/[ +3
public class HeapSort implements SortUtil.Sort{ cA"',N8!5
lTPo2-j/eK
/* (non-Javadoc) 88}c+V+N!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) : j&M&+
*/ KO(+%>^R
public void sort(int[] data) { XM3N>OR.
MaxHeap h=new MaxHeap(); @.fuR#
h.init(data); "GP!]3t
for(int i=0;i h.remove(); irCS}Dbw
System.arraycopy(h.queue,1,data,0,data.length); euM7> $`
} AiSO|!<.N
lhTjG,U=
private static class MaxHeap{ ll{jE
e#K =SV!H
void init(int[] data){ H,qIHQW#
this.queue=new int[data.length+1]; p5^,3&
for(int i=0;i queue[++size]=data; h&J6
fixUp(size); n6;jIf|
} i TY4X:x
} d$s1l
X'Q$v~/
private int size=0; Vb06z3"r
T#^
private int[] queue; \pZ,gF;y
4EzmH)4G
public int get() { 9iWDEk
return queue[1]; $j^Jj
} goi.'8M|/b
(,PO(
public void remove() { JxI}#iA
SortUtil.swap(queue,1,size--); L,.Ae i9
fixDown(1); .MuS"R{y
} !o 2"th
file://fixdown .Vux~A
private void fixDown(int k) { EvIL[\Dy
int j; !8vHN=)z
while ((j = k << 1) <= size) { ys:1%D,,_
if (j < size %26amp;%26amp; queue[j] j++; 0Fsz
if (queue[k]>queue[j]) file://不用交换 pt;E~_
break; VO>A+vx3M
SortUtil.swap(queue,j,k); +Y,>ftN
k = j; $<2r;'?0D
} |c,":R
} STs~GOm-
private void fixUp(int k) { JpE4 o2
while (k > 1) { zJ7vAL
int j = k >> 1; `@ULG>
if (queue[j]>queue[k]) 8Wid.o-U
break; 6GG&mqr+
SortUtil.swap(queue,j,k); %(Sy XZ
k = j; M(x5D;db/
} Wm4@+}
} -Ep cX!i
npg.*I/>
} }kI-UEn$EP
on $?c
} |\2zw _o
Adgh:'h
SortUtil： 33|>u+
OBi9aFoQ
package org.rut.util.algorithm; _)Q)tOW
ed4:r/Dpo
import org.rut.util.algorithm.support.BubbleSort; `h_,I R<
import org.rut.util.algorithm.support.HeapSort; <Bb$d@c
import org.rut.util.algorithm.support.ImprovedMergeSort; WM NcPHcj
import org.rut.util.algorithm.support.ImprovedQuickSort; Lv+lLK
import org.rut.util.algorithm.support.InsertSort; 0G1?
import org.rut.util.algorithm.support.MergeSort; KZzOs9 s
import org.rut.util.algorithm.support.QuickSort; ln)_Jf1r
import org.rut.util.algorithm.support.SelectionSort; Z; Xg5
import org.rut.util.algorithm.support.ShellSort; !!4_x
dON4r2-yC
/** bgGd
* @author treeroot CE-ySIa
* @since 2006-2-2 br+{23&1R#
* @version 1.0 'YQ"Lf
*/ {NXc<0a(
public class SortUtil { 6ND,4'6
public final static int INSERT = 1; Zalgg/.
public final static int BUBBLE = 2; +I#4+0f
public final static int SELECTION = 3; g !w7Yv
public final static int SHELL = 4; LEvdPG$)
public final static int QUICK = 5; G`PSb<h\oc
public final static int IMPROVED_QUICK = 6; mm\Jf
public final static int MERGE = 7; T j9;".
public final static int IMPROVED_MERGE = 8; /]2-I_WB
public final static int HEAP = 9; 16)@<7b]J
|_8::kir:
public static void sort(int[] data) { g<{/mxv/
sort(data, IMPROVED_QUICK); RK#e7
} GrjL9+|x
private static String[] name={ qlD+[`=b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" buX$O{43I
}; gBUtv|(@>[
o!^':mll
private static Sort[] impl=new Sort[]{ Lgpj<H[
new InsertSort(), KB <n-'
new BubbleSort(), Bx0^?>
new SelectionSort(), qyGVyi3
new ShellSort(), pL8+gL
new QuickSort(), YuSe~~F)j
new ImprovedQuickSort(), w'K\}G~
new MergeSort(), zz 7m\
new ImprovedMergeSort(), G*2bYsnhX
new HeapSort() 0DhF3]
}; A;m)/@
ViQxOUE
public static String toString(int algorithm){ 7lY&/-V
return name[algorithm-1]; Q7UFF
} ."l@aE=|
Ox.&tW%@
public static void sort(int[] data, int algorithm) { [[P?T^KT
impl[algorithm-1].sort(data); yZ)GP!cM4c
} `YAqR?Xj_<
%50}oD@
public static interface Sort { P}N%**>`
public void sort(int[] data); }legh:/*?O
} X+;Ivx
sy+1xnz
public static void swap(int[] data, int i, int j) { _$PZID
int temp = data; ,n TC7V
data = data[j]; 'm}K$h(U
data[j] = temp; ZW}*]rg
} y_M<\b
} ]24aK_Uu