[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; B*~Bm.
} .j$bCKXGx
int i1=l; 3'NL1du
int i2=mid+1; 9;WOqBD
for(int cur=l;cur<=r;cur++){ eX),B
if(i1==mid+1) b.u8w2(
data[cur]=temp[i2++]; .Yv.-A=ZIg
else if(i2>r) {~{s=c0
data[cur]=temp[i1++]; E;Ftop
else if(temp[i1] data[cur]=temp[i1++]; WT? U~.U
else jQBdS. }'v
data[cur]=temp[i2++]; %'g-%2C?
} Kgio}y
} ;{C{V{
H_r'q9@<>
} ZN]c>w[ )I
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改进后的归并排序: .6A:t?.
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package org.rut.util.algorithm.support; w0`L)f5v
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import org.rut.util.algorithm.SortUtil; hb\Y)HSp/
g.sV$.T2K
/** ^XB8A=xi
* @author treeroot uNGxz*e
* @since 2006-2-2 ] ,aAzjZ
* @version 1.0 x!Y@31!Dy
*/ 80"=Qu{s
public class ImprovedMergeSort implements SortUtil.Sort { Br$PL&e~
u! FSXX<
private static final int THRESHOLD = 10; 0\<-R
r4>I?lD
/* QKkr~?sTO
* (non-Javadoc) p?NjxQLA
* L/+J|_J)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JF\viMfR
*/ 7%FZXsD
public void sort(int[] data) { e9~4wt
int[] temp=new int[data.length]; 5WN Z7cO
mergeSort(data,temp,0,data.length-1); ^"#rDP"v
} e{+{,g{iu
:|mkI#P.
private void mergeSort(int[] data, int[] temp, int l, int r) { :pu{3-n.
int i, j, k; %hb5C 4q
int mid = (l + r) / 2; tLXw&hFk`g
if (l == r) 4'=N{.TtO
return; ._nKM5.
if ((mid - l) >= THRESHOLD) >o=p5#{
mergeSort(data, temp, l, mid); EQhV}9
else #C7j|9Ew1]
insertSort(data, l, mid - l + 1); CXFAb1m
if ((r - mid) > THRESHOLD) oVsazYJ|?
mergeSort(data, temp, mid + 1, r); ,(=]6V
else diLl>z
insertSort(data, mid + 1, r - mid); lH>XIEj
twS3J)UH
for (i = l; i <= mid; i++) { 6N)1/=)
temp = data; :P1c>:j[
} 9(.9l\h
for (j = 1; j <= r - mid; j++) { C7_T]e<
temp[r - j + 1] = data[j + mid]; i*/U.'#
} E,:pIw
int a = temp[l]; 9o'6es..@Z
int b = temp[r]; F7l:*r,O
for (i = l, j = r, k = l; k <= r; k++) { .*7UT~o=CS
if (a < b) { OIT;fKl9
data[k] = temp[i++]; EZfa0jJD
a = temp; ck+rOGv7{Z
} else { f)P/@rh
data[k] = temp[j--]; 6+z]MT
b = temp[j]; tP{$}cEY
} 291|KG
} jP'b! 4
} E-iBA(H
x7@HPf
/** ?zu{&aOX|
* @param data qE:DJy<
* @param l jdf@lb=5l
* @param i Z!eq/
*/ w8ld*z
private void insertSort(int[] data, int start, int len) { (32nI?)a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9?c^~77
} 5/ju it
} .)zISa*Xy
} c3t8yifQ
} _q4m7C<
='>UKy[=
堆排序： Rw 8o]
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package org.rut.util.algorithm.support; L:Eb(z/D
KHN ,SB
import org.rut.util.algorithm.SortUtil; 2f4c;YS
lHqx}n@e
/** jy2nn:1#^
* @author treeroot +}/!yQtH
* @since 2006-2-2 59]9-1" +
* @version 1.0 [1GEe
*/ /D+$|kmW]
public class HeapSort implements SortUtil.Sort{ fC|u
~Xw?>&
/* (non-Javadoc) D|:sSld @
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :/qO*&i,N
*/ kc[["w&
public void sort(int[] data) { &Qjl|2
MaxHeap h=new MaxHeap(); -P&e4sV{
h.init(data); L{pg?#\yC
for(int i=0;i h.remove(); oy: MM
System.arraycopy(h.queue,1,data,0,data.length); 2&URIQg*J
} #{,IY03
j}l8k@f
private static class MaxHeap{ 3>Snd9Q
F k;su,]_
void init(int[] data){ CF_!{X_k}
this.queue=new int[data.length+1]; n#cN[C9
for(int i=0;i queue[++size]=data; qT @IY)e
fixUp(size); f tDV3If
} k;7.qhe:
} mO.U)tL[
<LN$[&f#
private int size=0; q04Dj-2<
|9eY R
private int[] queue; 2A+,. S_!x
J3;KQ}F.I
public int get() { n.RhA-O
return queue[1]; 7d)' y
} eUlb6{!y?
W<o0Z OO
public void remove() { qH"a!
SortUtil.swap(queue,1,size--); -+|[0hpw
fixDown(1); v1)6")8o+
} E2D8s=r
file://fixdown qw1J{xoHW
private void fixDown(int k) { 2s%M,Nb
int j; NhX.yLb$
while ((j = k << 1) <= size) { C|LQYz-{
if (j < size %26amp;%26amp; queue[j] j++; EQC
if (queue[k]>queue[j]) file://不用交换 P.DWC'IBN
break; ?F{xDfqw
SortUtil.swap(queue,j,k); 'O9=*L)X
k = j; @x +#ZD(
} W^Y0>W~
} ;bE6Y]"Rz
private void fixUp(int k) { B$EP'5@b
while (k > 1) { \'*`te:{
int j = k >> 1; =U2n"du
if (queue[j]>queue[k]) a*ymBGF
break; x$DJ
SortUtil.swap(queue,j,k); V"iLeC
k = j; *'-^R9dN.S
} i{qURP}.
} rK|&u v*b
Ya 4$7|(
} ]{^vs'as\
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} ]i2\2MTW8
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SortUtil： [)n}!5fE
c@M@t0WT[
package org.rut.util.algorithm; b0 `9wn
%QLYNuG
import org.rut.util.algorithm.support.BubbleSort; l&xD3u^G
import org.rut.util.algorithm.support.HeapSort; }j*/>m
import org.rut.util.algorithm.support.ImprovedMergeSort; _1Gut"!{\
import org.rut.util.algorithm.support.ImprovedQuickSort; @8yFM%
import org.rut.util.algorithm.support.InsertSort; *!@x<Hf<
import org.rut.util.algorithm.support.MergeSort; tC-KW~&
import org.rut.util.algorithm.support.QuickSort; [HDO^6U
import org.rut.util.algorithm.support.SelectionSort; %tQ{Hf~
import org.rut.util.algorithm.support.ShellSort; >+8I =S
r0 C6Ww7u
/** _\PoZ|G4y
* @author treeroot E,yK` mPp^
* @since 2006-2-2 VTfaZ/e.
* @version 1.0 d<nB=r!*
*/ \w[%n0
public class SortUtil { m]q!y3
public final static int INSERT = 1; aZ`agsofk
public final static int BUBBLE = 2; ;@~*z4U
public final static int SELECTION = 3; |9$'?4F
public final static int SHELL = 4; 5V8C+k)
public final static int QUICK = 5; :9#{p^:o
public final static int IMPROVED_QUICK = 6; l?_!eA
public final static int MERGE = 7; \RyA}P5S
public final static int IMPROVED_MERGE = 8; N~_jiVD>
public final static int HEAP = 9; Cbs4`D,
?^4sE-C6
public static void sort(int[] data) { IkNt! 2s_
sort(data, IMPROVED_QUICK); uA`PZ|
} N2s%p6RMPD
private static String[] name={ 6'!{0 5=m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =2)t1 H
}; s/H"Ab
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private static Sort[] impl=new Sort[]{ W+C_=7_
new InsertSort(), 8;&S9'ci
new BubbleSort(), g@VndAp
new SelectionSort(), _rdj,F8
new ShellSort(), 0(9@GIT
new QuickSort(), <dPxy`_
new ImprovedQuickSort(), q*TKs#3
new MergeSort(), Ab<Ok\e5
new ImprovedMergeSort(), [j U
new HeapSort() lILtxVBO2o
}; F>(#Af9
BG0Mj2
public static String toString(int algorithm){ YKOO(?lv
return name[algorithm-1]; &})d%*n
} U*"cf>dB(
vD9D:vK
public static void sort(int[] data, int algorithm) { 05I39/T%
impl[algorithm-1].sort(data); A=]F_
} - :z5m+
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public static interface Sort { kS#DKo
public void sort(int[] data); q)xl$*g
} v|2q2bz
Q4LlToHn
public static void swap(int[] data, int i, int j) { `G0rF\[
int temp = data; @"Fp;Je\bN
data = data[j]; w[oQ}5?9'
data[j] = temp; P`IG9
} (,c?}TP
} A-C)w/7