[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; #JGy2Hk$^
} +}X?+Epm
int i1=l; r+0"1\f3
int i2=mid+1; l'VgS:NT
for(int cur=l;cur<=r;cur++){ wYhWRgP
if(i1==mid+1) y>u+.z a|
data[cur]=temp[i2++]; gy _86y@
else if(i2>r) ~-Rr[O=E
data[cur]=temp[i1++]; V#|#% 8
else if(temp[i1] data[cur]=temp[i1++]; R)t"`'6|
else @?{n`K7{`
data[cur]=temp[i2++]; Pv`yOx&nE
} 5B .+>u"e
} 'Ol}nmJ'n
xUPM-eF=
} ,:QG%Et
[bJ/$A
改进后的归并排序: X4&{/;$
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package org.rut.util.algorithm.support; 0^|)[2m!
}3Pz{{B&+O
import org.rut.util.algorithm.SortUtil; ;'dw`)~jQ
&Hc8u,|
/** GdR>S('
* @author treeroot 9'Y~! vY
* @since 2006-2-2 FqQm*k_
* @version 1.0 SZ~Ti|^
*/ LDW":k|
public class ImprovedMergeSort implements SortUtil.Sort { R,/?p
()K%Rn
private static final int THRESHOLD = 10; =lS~2C
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/* bP6QF1L
* (non-Javadoc) 4>{q("r,
* n<kcK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t</rvAH E
*/ `Qv7aY
public void sort(int[] data) { OqY8\>f-
int[] temp=new int[data.length]; gCgMmD=AZ
mergeSort(data,temp,0,data.length-1); 18Vtk"j
} >c\'4M8Cz
4kNf4l9Y
private void mergeSort(int[] data, int[] temp, int l, int r) { r`i<XGPJ%
int i, j, k; -Duy:C6W
int mid = (l + r) / 2; +%6{>C+bZo
if (l == r) S3:Pjz}t
return; 0(ZER sP
if ((mid - l) >= THRESHOLD) <m`HK.|~
mergeSort(data, temp, l, mid); I_'S|L
else }-)2CEj3L%
insertSort(data, l, mid - l + 1); [U]*OQH`e
if ((r - mid) > THRESHOLD) IQoz8!guh:
mergeSort(data, temp, mid + 1, r); 85m[^WGyh
else v@LK3S/!3
insertSort(data, mid + 1, r - mid); >yg mE`g
R"Hhc(H
for (i = l; i <= mid; i++) { :+/V
temp = data; cG,B;kMjo
} 1s=M3m&H
for (j = 1; j <= r - mid; j++) { II)\rVP5
temp[r - j + 1] = data[j + mid]; PLKp<kg
} IBf&'/ 8\
int a = temp[l]; rv&(yA
int b = temp[r]; S$+vRX7
for (i = l, j = r, k = l; k <= r; k++) { ly}6zOC\
if (a < b) { ?2%d;tW
data[k] = temp[i++]; h5U@Ys
a = temp; iT%aAVs
} else { Va\dMv-b
data[k] = temp[j--]; qWGnIPk
b = temp[j]; n(/(F`
} R(kr@hM
} _,=A\C_b@
} @~U: |h
92WvD
/** 9loWh5_1Z
* @param data |zKe*H/
* @param l 4Ucg<Z&%
* @param i g6IG>)
*/ '49&qO5B
private void insertSort(int[] data, int start, int len) { 7qA0bUee5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cTHSPr?<
} L|qQZ=
} wW1aG
} gV):3mWC
} :mXc|W3
~_QZiuq&
堆排序： X_ne#ZPl
36*"oD=@
package org.rut.util.algorithm.support; 8t!(!<iF0
#gMMhB=
import org.rut.util.algorithm.SortUtil; #Bg88!-4
CuR\JKdRo
/** Lz2wOB1Zc+
* @author treeroot *j?tcxq
* @since 2006-2-2 ;RflzY|D
* @version 1.0 :`2<SF^0O
*/ fB:9:NX
public class HeapSort implements SortUtil.Sort{ hq6fDRO/4
1Zx|SBF
/* (non-Javadoc) HlqCL1\<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \-0@9E<D
*/ cNtGjLpx;
public void sort(int[] data) { [pUw(KV2m
MaxHeap h=new MaxHeap(); wV+ W(
h.init(data); D!h8NZ;El
for(int i=0;i h.remove(); B&Q\J>l9S
System.arraycopy(h.queue,1,data,0,data.length); C~ t?<
} am{f<v,EI
oN)l/"%C7/
private static class MaxHeap{ =SB#rCH
{^i73}@O
void init(int[] data){ 8B JxD<
this.queue=new int[data.length+1]; J_C<Erx[O
for(int i=0;i queue[++size]=data; (8TB*BhQ_
fixUp(size); 53J!iNnXT6
} WW{5[;LYiB
} :.'<ndM
&M,a+|yuY
private int size=0; G+stt(k:
k<Z^93 S
private int[] queue; @*]l.F
^ llZf$`
public int get() { {E-.W"t4
return queue[1]; "XT7;!
} ]|it&4l
Tz4,lwuWX7
public void remove() { D*6v.`]X
SortUtil.swap(queue,1,size--); mcy\nAf5%
fixDown(1); L3JFQc/oh~
} Yz=(zj
file://fixdown OXe+=Lp<
private void fixDown(int k) { QG*=N {%5
int j; 'A;G[(SYy
while ((j = k << 1) <= size) { `uM:>
if (j < size %26amp;%26amp; queue[j] j++; &PaqqU.
if (queue[k]>queue[j]) file://不用交换 dF:@BEo
break; QO0}-wZR
SortUtil.swap(queue,j,k); ']Gqa$(YC
k = j; &)JQ6J_|\
} =.(yOUI
} >A5R
private void fixUp(int k) { %@#+Xpa+
while (k > 1) { ^hzlR[
int j = k >> 1; U`N|pPe:w
if (queue[j]>queue[k]) a yn6k=F
break; \ T/i]z
SortUtil.swap(queue,j,k); nDuf<mw
k = j; ^E\{&kaUp
} Qz\yoI8JA,
} 8]skAh
[bk2RaX:i
} ^u&oS1U
1j0OV9-|
} \ZX5dFu0
T]-yTsto
SortUtil： gD10C,{
{a^A-Xh[u
package org.rut.util.algorithm; 0B fqEAl
o(w!x!["
import org.rut.util.algorithm.support.BubbleSort; k4fc5P
import org.rut.util.algorithm.support.HeapSort; .) uUpY%K^
import org.rut.util.algorithm.support.ImprovedMergeSort; B4yU}v
import org.rut.util.algorithm.support.ImprovedQuickSort; *GleeJWz
import org.rut.util.algorithm.support.InsertSort; Wt4ROj
import org.rut.util.algorithm.support.MergeSort; Gdmh#pv
import org.rut.util.algorithm.support.QuickSort; T6m#sVq
import org.rut.util.algorithm.support.SelectionSort; C~4_Vc*
import org.rut.util.algorithm.support.ShellSort; JBfDz0P
mR@|]T
/** vw5f.8T;w
* @author treeroot Z:DEET!c'k
* @since 2006-2-2 -1iKeyyA
* @version 1.0 hTcy;zLLS
*/ =+5z;3
public class SortUtil { A'r 3%mC
public final static int INSERT = 1; E9z^#@s
public final static int BUBBLE = 2; =y-L'z&r
public final static int SELECTION = 3; M4 SJnE
public final static int SHELL = 4; Cw42bO
public final static int QUICK = 5; oJa6)+b(3
public final static int IMPROVED_QUICK = 6; YL-/z4g
public final static int MERGE = 7; Z?X0:WK
public final static int IMPROVED_MERGE = 8; Mx{VN P
public final static int HEAP = 9; o|Cq#JFG
OzY55
public static void sort(int[] data) { /WlK*8C
sort(data, IMPROVED_QUICK); nv&uhu/q
} 1{+x >Pv:
private static String[] name={ g?N~mca$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N1,=5P$
}; Ot}fGiio
)OQhtxK
private static Sort[] impl=new Sort[]{ WeDeD\zy
new InsertSort(), maAZI-H{
new BubbleSort(), {6{y"8
new SelectionSort(), &7Frg`B&:
new ShellSort(), #:C;VAAp
new QuickSort(), ASmMj;>UM
new ImprovedQuickSort(), <"A|Xv'Q
new MergeSort(), ^?PU:eS
new ImprovedMergeSort(), Z0&^U#]
new HeapSort() S^q)DuF5!
}; *uHL'Pe;m
uo0g51%9
public static String toString(int algorithm){ ,:g.B\'Q
return name[algorithm-1]; RrrW0<Ed
} r@N 0%JZZ
j !^Tw.Ty
public static void sort(int[] data, int algorithm) { {Hncm
impl[algorithm-1].sort(data); :VwU2
} xg=}MoX
2VmQ%y6e"
public static interface Sort { .N2yn`
public void sort(int[] data); HR)Dz~Obw
} 5\93-e
s2f95<B
public static void swap(int[] data, int i, int j) { J)1:jieQ
int temp = data; lyGQ6zlSn
data = data[j]; 79 zFF
data[j] = temp; 0#(K}9T)
} uC\FW6K=m
} gXr"],OM;