[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; iscz}E,Y
} f<_Cq<q"
int i1=l; `^vE9nW7
int i2=mid+1; s~>}a
for(int cur=l;cur<=r;cur++){ `L zPotz
if(i1==mid+1) wzA$'+Mb
data[cur]=temp[i2++]; [^)g%|W
else if(i2>r) OI*H,Z"
data[cur]=temp[i1++]; G*m0\
else if(temp[i1] data[cur]=temp[i1++]; y-k.U%
else [0of1eCSl
data[cur]=temp[i2++]; v19-./H^ j
} 4*L_)z&4;
} x2EUr,7
~[ jQ!tz
} !i50QA|(G
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改进后的归并排序: '91/md5
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package org.rut.util.algorithm.support; pmM9,6P4@
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import org.rut.util.algorithm.SortUtil; Dv"9qk
;gkM{={`p
/** |4JEU3\$
* @author treeroot 45e~6",
* @since 2006-2-2 sB</DS
* @version 1.0 XSDpRo
*/ Y73C5.dNcE
public class ImprovedMergeSort implements SortUtil.Sort { Ri{=]$
oRFq@g
private static final int THRESHOLD = 10; KXy6Eno
$`c:&
/* j.Hf/vi`z
* (non-Javadoc) +0&/g&a\R
* osRy e3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2T35{Q!=F
*/ 1^}+=~
public void sort(int[] data) { UZMd~|
int[] temp=new int[data.length]; S!UaH>Rh
mergeSort(data,temp,0,data.length-1); 7r!x1
} h\o.&6sd
VRMXtQ*1Dm
private void mergeSort(int[] data, int[] temp, int l, int r) { zdYjF|
int i, j, k; r" y.KD^
int mid = (l + r) / 2; 2:kH[#
if (l == r) Ie_wHcM<
return; +R&gqja
if ((mid - l) >= THRESHOLD) paK2xX8E
mergeSort(data, temp, l, mid); *T/']t
else Wc#24:OKe3
insertSort(data, l, mid - l + 1); +2{Lh7Ks
if ((r - mid) > THRESHOLD) 6t$8M[0-U
mergeSort(data, temp, mid + 1, r); khe}*y
else l-Z4Mq6*L
insertSort(data, mid + 1, r - mid); j_AACq {.
+rd+0 `}C
for (i = l; i <= mid; i++) { tA;}h7/Lc~
temp = data; 8=l%5r^cq
} kj_c%T ]/
for (j = 1; j <= r - mid; j++) { ,prf;|e?
temp[r - j + 1] = data[j + mid]; XTyxr
} Ytkv!]"
int a = temp[l]; k:;r2f
int b = temp[r]; \dVOwr
for (i = l, j = r, k = l; k <= r; k++) { v+XJ*N[W
if (a < b) { (HVGlw'`
data[k] = temp[i++]; X8|,
a = temp; DVA:Cmh\
} else { :> '+"M2r
data[k] = temp[j--]; ;I}fBZ3
b = temp[j]; t0S1QC+
} Cye.gsCT
} z_HdISy0
} /xhKd]Q
1#x0q:6
/** F%|h;+5
* @param data D~m*!w*
* @param l qm}@!z^
* @param i lN@o2QX
*/ ^c|/*u
private void insertSort(int[] data, int start, int len) { iTwm3V P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :X=hQ:>P
} >7|VR:U?B
} Ac@VGT:9
} *w&e\i|7
} x:Y1P:
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堆排序： Hs8>anVo[
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package org.rut.util.algorithm.support; V!Uc(
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import org.rut.util.algorithm.SortUtil; V0@=^Bls
e+WNk 2
/** }#fbbtd
* @author treeroot ]M=&+c>H~
* @since 2006-2-2 aN?zmkPpov
* @version 1.0 /: "1Z]@
*/ a(nlTMfu
public class HeapSort implements SortUtil.Sort{ dd;~K&_Q/i
?9/G[[(
/* (non-Javadoc) o&%g8=n%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4s-!7
*/ 9{l}bu/u
public void sort(int[] data) { dPlV>IM$z
MaxHeap h=new MaxHeap(); T)/eeZ$
h.init(data); 0J9x9j`&j
for(int i=0;i h.remove(); lA]8&+,ZM
System.arraycopy(h.queue,1,data,0,data.length); ?,mmYW6TjB
} kP:!/g
iS^QTuk3%
private static class MaxHeap{ uRvP hkqm
,+k\p5P
void init(int[] data){ [y(MCf19
this.queue=new int[data.length+1]; @gblW*Zhk
for(int i=0;i queue[++size]=data; L!92P{K
fixUp(size); %b$>qW\*&
} )A6<c%d =x
} B\~}3!j
/uflpV|
private int size=0; (.:e,l{U%
XFl6M~ c
private int[] queue; dO'(2J8
{: /}NpA$
public int get() { ?uu*L6
return queue[1]; aE8VZ8tvq
} Dt@SqX:~Ee
Nn6%9PX_)
public void remove() { kiEa<-]
SortUtil.swap(queue,1,size--); w)f#V s
fixDown(1); :#Wd~~d
} )=+|i3]U
file://fixdown 5pX6t
private void fixDown(int k) { 6nn*]|7
int j; itz,mrP
while ((j = k << 1) <= size) { ("KF'fp&M2
if (j < size %26amp;%26amp; queue[j] j++; |!ELV7?(
if (queue[k]>queue[j]) file://不用交换 "oyo#-5z
break; &ZO0r ^
SortUtil.swap(queue,j,k); Wtnfa{gP%
k = j; F?0Ykjh3
} OUnA;_
} pa+hL,w{6
private void fixUp(int k) { hrk r'3lv
while (k > 1) { )%TmAaj9d
int j = k >> 1; 6tZI["\
if (queue[j]>queue[k]) $nb[GV
break; UMi~14& ;
SortUtil.swap(queue,j,k); tQVVhXQ7
k = j; ^iA9%zp
} UKGPtKE<
} *~`(RV
h[ ZN+M
} i8p6Xht
jXJyc'm7
} e-;}366}
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SortUtil： sOY:e/_F
A/(a`"mK|'
package org.rut.util.algorithm; _c07}aQ ],
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import org.rut.util.algorithm.support.BubbleSort; (7Qo
import org.rut.util.algorithm.support.HeapSort; hH.G#-JO
import org.rut.util.algorithm.support.ImprovedMergeSort; ~*7]r`6\@
import org.rut.util.algorithm.support.ImprovedQuickSort; GgU/!@
import org.rut.util.algorithm.support.InsertSort; g(g& TO
import org.rut.util.algorithm.support.MergeSort; [g,}gyeS(
import org.rut.util.algorithm.support.QuickSort; \V:^h[ad
import org.rut.util.algorithm.support.SelectionSort; z?zL97H
import org.rut.util.algorithm.support.ShellSort; >_} I.\X
}H2R3icE
/** qs6aB0ln
* @author treeroot iZ%yd-
* @since 2006-2-2 %<5'=t'|-U
* @version 1.0 |Tw~@kT@
*/ AA_%<zK
public class SortUtil { 7)m9"InDI
public final static int INSERT = 1; b>k y
public final static int BUBBLE = 2; M|-)GvR$J
public final static int SELECTION = 3; }Z>)DN=+
public final static int SHELL = 4; `oJ [u:b
public final static int QUICK = 5; 2%1hdA<
public final static int IMPROVED_QUICK = 6; pAEx#ck
public final static int MERGE = 7; ~[: 2I
public final static int IMPROVED_MERGE = 8; t^HRgY'NjM
public final static int HEAP = 9; *j=% #
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public static void sort(int[] data) { Ac6=(B
sort(data, IMPROVED_QUICK); %y@AA>x!
} ysN3
private static String[] name={ 2c}E(8e]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rcv9mj]l
}; <3iMRe
0(Ij%Wi,
private static Sort[] impl=new Sort[]{ 6@o*xK7L
new InsertSort(), POW>~Tof1
new BubbleSort(), QJNFA}*>
new SelectionSort(), 0x7'^Z>-oe
new ShellSort(), $kgVa^
new QuickSort(), NA*&#X#~
new ImprovedQuickSort(), l6B@qYLZ
new MergeSort(), 3$w65=
new ImprovedMergeSort(), ^aQ"E9
new HeapSort() g}i61(
}; V)^+?B)T
+p^u^a
public static String toString(int algorithm){ b-y
return name[algorithm-1]; ;jPXs
} <VcQ{F
MDN--p08
public static void sort(int[] data, int algorithm) { 4 :=]<sc,
impl[algorithm-1].sort(data); DlT{`
} 2:R+tn(F
*I'yH8Fcn
public static interface Sort { kT?J5u_o
public void sort(int[] data); v<;Md-<
} Jwp7gYZ
'S~5"6r
public static void swap(int[] data, int i, int j) { ~ 1pr~
int temp = data; (t.Nk[
data = data[j]; x"(KBEK~
data[j] = temp; edV\-H5<
} +V+a4lU14
} /=h` L,