[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; U}c05GiQw
} Lt2<3DB
int i1=l; 3FsX3K,_X
int i2=mid+1; /7&WFCc)(
for(int cur=l;cur<=r;cur++){ "VgPaz#
if(i1==mid+1) 1qE*M7_:E>
data[cur]=temp[i2++]; \:Z8"~G
else if(i2>r) owe6ge7m
data[cur]=temp[i1++]; Q60'5Wt
else if(temp[i1] data[cur]=temp[i1++]; 60X))MyN
else ;R*tT%Z,
data[cur]=temp[i2++]; 4YyVh.x
} W0\ n?$ZC~
} I!u fw\[
TFI$>Oz|
} RCY}JH>}
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改进后的归并排序: O)D+u@RhH
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package org.rut.util.algorithm.support; KvNw'3Ua
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import org.rut.util.algorithm.SortUtil; H|s,;1#
5NN`tv
/** eD)@:K
* @author treeroot :$^cY>o
* @since 2006-2-2 c3!YA"5
* @version 1.0 r#\Lq;+-B
*/ qs3V2lvYw{
public class ImprovedMergeSort implements SortUtil.Sort { ;G4g;YHy|
|*JMCI@Mz
private static final int THRESHOLD = 10; 5uO.@0
Z3N^)j8
/* 8Uoqj=5F
* (non-Javadoc) 7"p%c`*;
* ,A;wLI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &b=OT%D~FU
*/ @ Br?
public void sort(int[] data) { C o,"
int[] temp=new int[data.length]; ~vw$Rnotz
mergeSort(data,temp,0,data.length-1); L%31>)8
} Qt"i
Xr]<v%,C
private void mergeSort(int[] data, int[] temp, int l, int r) { {LqahO*
int i, j, k; U@"f(YL+"
int mid = (l + r) / 2; 9N;y^ Y\
if (l == r) UY/qI%#L#,
return; iE* Y@E5x0
if ((mid - l) >= THRESHOLD) !f)^z9QX8
mergeSort(data, temp, l, mid); Q=#@g
else *9|*21
insertSort(data, l, mid - l + 1); :\IZ-
if ((r - mid) > THRESHOLD) FGu#Pa
mergeSort(data, temp, mid + 1, r); L /V;;
else 04@?Jb1*
insertSort(data, mid + 1, r - mid); f1 Zj:3e
/m8&E*+T1
for (i = l; i <= mid; i++) { b =R9@!
temp = data; 4nU+Wj?T
} Ht&%`\9s
for (j = 1; j <= r - mid; j++) { _7N^<'B
temp[r - j + 1] = data[j + mid]; %]fi;Z
} r9whW;"q
int a = temp[l]; 9 $Ud\
int b = temp[r]; d5l].%~
for (i = l, j = r, k = l; k <= r; k++) { (<ngdf`,
if (a < b) { ~zyD=jxP9
data[k] = temp[i++]; V@`A:Nc_>
a = temp; Z lR2
} else { CNrK]+>
data[k] = temp[j--]; z~\Y*\f^Y3
b = temp[j]; 5v5K}hx
} cnR18NK
} :i/uRR
} 0%;y'd**Ck
/}R*'y
/** #mW#K
* @param data TA>28/U#
* @param l *IV_evgM7
* @param i nx|b9W<
*/ n--w-1
private void insertSort(int[] data, int start, int len) { zz1]6B*eX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1D2Yued
} ,&0iFUwN_
} Or"+d 5
} Usf7 AS=
} <BhNmEo)2
E2yL9]K2
堆排序： =6< Am
t[HA86X
package org.rut.util.algorithm.support; %C~LKs5oH
#uCE0}N@
import org.rut.util.algorithm.SortUtil; Rd>PE=u
V^qkHm e
/** .;jp2^
* @author treeroot OuV f<@a
* @since 2006-2-2 5<mGG;F
* @version 1.0 sX|bp)Nw
*/ 8mv}-;
public class HeapSort implements SortUtil.Sort{ *."a>?D~
TY*uK
/* (non-Javadoc) T5? eb"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kC=h[<'
*/ be+tAp`
public void sort(int[] data) { D5jZ;z}
MaxHeap h=new MaxHeap(); o 12wp
h.init(data); aT20FEZ;
for(int i=0;i h.remove(); WzdE XcY
System.arraycopy(h.queue,1,data,0,data.length); P= nu&$;
} ^^{7`X u
CK#SD|~:
private static class MaxHeap{ lt{yo\
e2vLUlL8
void init(int[] data){ M\)(_I)V=
this.queue=new int[data.length+1]; =`fz#Mfd
for(int i=0;i queue[++size]=data; Bxs0m]
fixUp(size); 6}^6+@LG
} uH=^ILN.
} uM74X^U
MH h;>tw
private int size=0; rLJjK$_x
sq1v._^s
private int[] queue; >%Nqgn$V
khS >
public int get() { ,c.(&@
return queue[1]; t+%tN^87:
} 5MmSQ_
dBM> ;S;v
public void remove() { `cn}}1Lg]
SortUtil.swap(queue,1,size--); C ehz]C
fixDown(1); 8D1+["&
} _0 $W;8X
file://fixdown 1zlBkK
private void fixDown(int k) { Ph/!a6y
int j; U[WR?J4~LX
while ((j = k << 1) <= size) { 3v@Y"I3;
if (j < size %26amp;%26amp; queue[j] j++; H*VZ&{\7
if (queue[k]>queue[j]) file://不用交换 >TB Rp,;r
break; m8C scCZ}
SortUtil.swap(queue,j,k); ^:64(7
k = j; uZkh.0yB
} _MST8
} PR;A 0
private void fixUp(int k) { $hE,BeQ
while (k > 1) { 4}MZB*);0
int j = k >> 1; 2%gLq
if (queue[j]>queue[k]) <6[P5>
break; ?0VETa ~m
SortUtil.swap(queue,j,k); {j4J(dtO
k = j; qe_59'K
} <WGx 6{
} {3R?<ET]mt
ED=P 6u
} -9@/S$i
3_cZaru
} ra>jVE0`
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SortUtil： 3 V{&o,6
~N=$%C
package org.rut.util.algorithm; SC/V3fW,
6gN>P%n
import org.rut.util.algorithm.support.BubbleSort; i.Jk(%c
import org.rut.util.algorithm.support.HeapSort; `vj"HhC
import org.rut.util.algorithm.support.ImprovedMergeSort; z3Ro*yJU
import org.rut.util.algorithm.support.ImprovedQuickSort; <Q|(dFr`v
import org.rut.util.algorithm.support.InsertSort; 5Ff1x-lQ
import org.rut.util.algorithm.support.MergeSort; v dR6y
import org.rut.util.algorithm.support.QuickSort; '>0rp\jC
import org.rut.util.algorithm.support.SelectionSort; >+E
import org.rut.util.algorithm.support.ShellSort; c</u]TD
'X{J~fEI!
/** ;JAb8dyS2
* @author treeroot })^%>yLfc|
* @since 2006-2-2 t)h{ w"v
* @version 1.0 )EptyH
*/ cO^}A(Ma(
public class SortUtil { 2pn8PQfg)
public final static int INSERT = 1; vivU4:uH3
public final static int BUBBLE = 2; ;"j>k>tg
public final static int SELECTION = 3; _7qGo7bpN
public final static int SHELL = 4; G$_=rHt_%
public final static int QUICK = 5; 6p1)wf.J
public final static int IMPROVED_QUICK = 6; I@9[
public final static int MERGE = 7; "5@k\?x"
public final static int IMPROVED_MERGE = 8; ._5"FUg
public final static int HEAP = 9; ed6eC8@
&R~)/y0]
public static void sort(int[] data) { \CDzVO0^
sort(data, IMPROVED_QUICK); t9(sSl
} 5U5)$K'OA
private static String[] name={ ,a1 1&"xl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u&\QZW?
}; =abBD
zy!mP
private static Sort[] impl=new Sort[]{ ;0 No@G;z
new InsertSort(), zb=L[2;
new BubbleSort(), >+8Kl`2sw;
new SelectionSort(), .X)TRD#MW
new ShellSort(), &ytnoj1L(
new QuickSort(), =%IBl]Z!"
new ImprovedQuickSort(), s!Y`1h{
new MergeSort(), )/_T`cN
new ImprovedMergeSort(), E,g5[s@
new HeapSort() r"aJ&~8::W
}; Z?_t3
Lkl+f~m
public static String toString(int algorithm){ q]r?s%x
return name[algorithm-1]; |E=8
} TU(w>v
g9K7_T #W
public static void sort(int[] data, int algorithm) { 01;
impl[algorithm-1].sort(data); iD-,C`
} uiEAi
oGa8#>
public static interface Sort { w +~,Mv\
public void sort(int[] data); }:f \!b
} ;S_\- ]m&g
rW<sQ0
public static void swap(int[] data, int i, int j) { $b=4_UroS
int temp = data; s`E^1jC
data = data[j]; %A ^qm
data[j] = temp; e+ckn
} pg:1AAhT[
} ="=Aac#n`