[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; J-/w{T8:
} 9{4oz<U
int i1=l; 8x-19#
int i2=mid+1; /fUdb=!Z
for(int cur=l;cur<=r;cur++){ 3|!3R'g/ >
if(i1==mid+1) EC5= 2w<
data[cur]=temp[i2++]; XY{N"S8
else if(i2>r) ?{aC-3VAT
data[cur]=temp[i1++]; uDND o
else if(temp[i1] data[cur]=temp[i1++]; Ce-= -
else }'tJc $!
data[cur]=temp[i2++]; |J4sQ!%K
} g4k3~,=D3
} Y!45Kio
7k,BE2]"
} q)9n%- YgP
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改进后的归并排序: bD=H$)
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package org.rut.util.algorithm.support; /&|p7
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import org.rut.util.algorithm.SortUtil; C-S>'\|8
k62s|VeU
/** VoYL}67c
* @author treeroot b-/QZvg
* @since 2006-2-2 @;Jv/N6@
* @version 1.0 WZ>nA[/
*/ |hj!NhBe
public class ImprovedMergeSort implements SortUtil.Sort { (/nnN4\=
,\iXZ5"R
private static final int THRESHOLD = 10; E9mu:T
h2x9LPLBxT
/* .s>@@m-
* (non-Javadoc) K"VcPDK
* 5?HwM[`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N@tKgx
*/ ~tWh6-:|{J
public void sort(int[] data) { c_ncx|dUs
int[] temp=new int[data.length]; xDU\mfeGj
mergeSort(data,temp,0,data.length-1); ?7V~>i8[
} 9#7W+9
@Ol(:{<
private void mergeSort(int[] data, int[] temp, int l, int r) { t O.5
int i, j, k; Ph]b6
int mid = (l + r) / 2; NA2={RB;
if (l == r) qJT/48lf_
return; fQC{LcS
if ((mid - l) >= THRESHOLD) awo'#Y2>
mergeSort(data, temp, l, mid); *<S>PbqLw
else /d}"s.3p
insertSort(data, l, mid - l + 1); BFw_T3}zn
if ((r - mid) > THRESHOLD) {e|.AD
mergeSort(data, temp, mid + 1, r); %w[Z/
else q=->) &D%
insertSort(data, mid + 1, r - mid); s&pnB
9s_^?q
for (i = l; i <= mid; i++) { tqpO3
temp = data; @Q,Q"c2
} O!nS3%De
for (j = 1; j <= r - mid; j++) { `XH0S`B
temp[r - j + 1] = data[j + mid]; Z" ;q w
} G3:!]}
int a = temp[l]; OFtf)cGE
int b = temp[r]; '4{=x]K
for (i = l, j = r, k = l; k <= r; k++) { aOd#f:{y
if (a < b) { <-?C\c~G@
data[k] = temp[i++]; .Ja].hP
a = temp; ~Z/,o)
} else { NW5OLa")J<
data[k] = temp[j--]; Q;VuoHj!
b = temp[j]; SWx: -<
} nl 'MWP
} v.<mrI#?
} hT1JEu
'I/_vqp@
/** [5~mP`He
* @param data ";=!PL
* @param l DqQp47kp
* @param i _rB,N#{2R=
*/ -->0e{y
private void insertSort(int[] data, int start, int len) { YX-~?Pl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +={K -g7U
} CR'%=N04^
} HdxP:s.T
} R)k\
} I[k"I(
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堆排序： v =y 2
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package org.rut.util.algorithm.support; ,\v'%,:C
D {Ol8:
import org.rut.util.algorithm.SortUtil; gep#o$P
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/** hm73Zy
* @author treeroot RVV`
* @since 2006-2-2 Sj~SG
* @version 1.0 ="YGR:
*/ B }%2FUv
public class HeapSort implements SortUtil.Sort{ ~C%I'z'
nI]EfHU
/* (non-Javadoc) <7Pp98si,u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r~)fAb?
*/ !\4B.
public void sort(int[] data) { #}y8hzS$
MaxHeap h=new MaxHeap(); ?Q-Tyf$3
h.init(data); 9r]|P}yuS
for(int i=0;i h.remove(); w1"+HJd
System.arraycopy(h.queue,1,data,0,data.length); SdYf^@%}F
} ErNYiYLi]
Oq.ss!/z
private static class MaxHeap{ gEj#>=s
*KvD$(ny
void init(int[] data){ c$ZVvu
this.queue=new int[data.length+1]; -sQ[f18
for(int i=0;i queue[++size]=data; *"w hup[
fixUp(size); 4l ZK@3
} 0i_:J
} klJ21j0Bb2
rT[qh+KWe
private int size=0; 2.z-&lFBZ
qMJJBl
private int[] queue; 6E}9uwQ
wv3,% lN
public int get() { QKj0~ia 5
return queue[1]; HGGq;Nbm
} `RnWh9
Gf\h7)T\
public void remove() { O,B\|pd2
SortUtil.swap(queue,1,size--); 95mf
fixDown(1); j-ej7
} acl<dY6
file://fixdown DD$>3`
private void fixDown(int k) { W\kli';jyC
int j; y,nmPX?]n
while ((j = k << 1) <= size) { VQla.Y
if (j < size %26amp;%26amp; queue[j] j++; aL;!BlU8v
if (queue[k]>queue[j]) file://不用交换 mcez3gH
break; e7U\gtZ.
SortUtil.swap(queue,j,k); {zAI-?#*u
k = j; .}!.4J%q2
} 7_i8'(``
} Kb?{^\FiU
private void fixUp(int k) { ~'_cBJ 'XD
while (k > 1) { ;yJ:W8U]+;
int j = k >> 1; o]oiJvOr
if (queue[j]>queue[k]) &+2l#3}
break; ,_3hbT8Q
SortUtil.swap(queue,j,k); tz@MZs09
k = j; 1.!U{>$
} }9S}?R
} 0y9 b0G
p' >i3T(
} .ImaM
[7v|bd
} ZkbE&7Z
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SortUtil： BNK]Os
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package org.rut.util.algorithm; h+g\tYWGP
v(2N@s<%
import org.rut.util.algorithm.support.BubbleSort; J3_aHI
import org.rut.util.algorithm.support.HeapSort; u;_~{VJ-
import org.rut.util.algorithm.support.ImprovedMergeSort; uNzc,OH
import org.rut.util.algorithm.support.ImprovedQuickSort; p:4jY|q
import org.rut.util.algorithm.support.InsertSort; h+[6i{
import org.rut.util.algorithm.support.MergeSort; O_:l;D#i
import org.rut.util.algorithm.support.QuickSort; _nbr%PD,
import org.rut.util.algorithm.support.SelectionSort; aZA``#p+
import org.rut.util.algorithm.support.ShellSort; ]1!" q40)]
3%Y:+%VE
/** @z@%vr=vX
* @author treeroot D!&(#Vl _
* @since 2006-2-2 P"vrYom
* @version 1.0 3xChik{
*/ =j,WQ66r3
public class SortUtil { F[jE#M=k
public final static int INSERT = 1; ,L/x\_28
public final static int BUBBLE = 2; |u&cN-}C d
public final static int SELECTION = 3; P"w\hF
public final static int SHELL = 4; |H5.2P&9-5
public final static int QUICK = 5; I/f\m}}ba
public final static int IMPROVED_QUICK = 6; V"4Z9Qg}
public final static int MERGE = 7; E8# >k
public final static int IMPROVED_MERGE = 8; ;Q;j@yx
public final static int HEAP = 9; j!u)V1,
#V!a<w4_
public static void sort(int[] data) { KrE'M
sort(data, IMPROVED_QUICK); ntW@Fm:bw>
} 9|+6@6VY!
private static String[] name={ mOE *[S)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .;?!I_`
}; eTuqK23
zK<af
private static Sort[] impl=new Sort[]{ g":[rXvId
new InsertSort(), R+M&\5
new BubbleSort(), T D_@0Rd
new SelectionSort(), z:,PwLU
new ShellSort(), V_+&Y$msi~
new QuickSort(), 9@ tp#
new ImprovedQuickSort(), V%s g+D2
new MergeSort(), 8+F5n!
new ImprovedMergeSort(), Kw -SOFE
new HeapSort() 4yl{:!la
}; i>F=XE
3P cVE\GN
public static String toString(int algorithm){ `R[Hxi
return name[algorithm-1]; }E 'r?N
} _Iy\,<
8%[pno |0I
public static void sort(int[] data, int algorithm) { @Wu-&Lb
impl[algorithm-1].sort(data); L:G#>
} ZwmucY%3
-#|D>
public static interface Sort { qA)OkR'm
public void sort(int[] data); "`vRHeCKN
} *M.xVUPr
$]2)r[eA)
public static void swap(int[] data, int i, int j) { '0+*
int temp = data; ZitM<Qi&y
data = data[j]; d!,t_jM0
data[j] = temp; )[Y B&
} ScPVjqG2{
} PVCoXOqh