[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; eOPCYyN
} k.xv+^b9Q
int i1=l; `}8@[iB'
int i2=mid+1; Q=L$7
for(int cur=l;cur<=r;cur++){ maUHjI 5A-
if(i1==mid+1) }42qMOi#w1
data[cur]=temp[i2++]; vs])%l%t
else if(i2>r) ]n]uN~)9
data[cur]=temp[i1++]; dFP-(dX#
else if(temp[i1] data[cur]=temp[i1++]; |k .M+
else xCp+<|1
data[cur]=temp[i2++]; ?~JxO/K
} MRg\FR2>1
} T19rbL_
u~- fK'/!|
} QB3d7e)8>
}d3N`TT
改进后的归并排序: {_toh/8)r
#w,WwL!
package org.rut.util.algorithm.support; oz0n$`O$/
~? FrI
import org.rut.util.algorithm.SortUtil; +.(}u ,:8
2u*h*/
/** B?lBO V4v4
* @author treeroot g3~~"`2
* @since 2006-2-2 lc3S|4
* @version 1.0 Uq]EJu
*/ Fwx~ ~"I
public class ImprovedMergeSort implements SortUtil.Sort { ZCE%38E N
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private static final int THRESHOLD = 10; a j@C0
T5dUJR2k$
/* $dZ>bXUw:
* (non-Javadoc) 5}MlZp
* ELrZ8&5G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "gbnLKs
*/ q?Ku}eID3
public void sort(int[] data) { MX`Wg
int[] temp=new int[data.length]; `mKlv~$1^
mergeSort(data,temp,0,data.length-1); > 0Twr
} BsK|:MM]
uVq5fT`B
private void mergeSort(int[] data, int[] temp, int l, int r) { V3 _b!
int i, j, k; Q3Z%a|3W
int mid = (l + r) / 2; ~ACP%QM=
if (l == r) SGBVR^
return; I*:qGr+ WJ
if ((mid - l) >= THRESHOLD) J|"nwY}a9
mergeSort(data, temp, l, mid); Ku0H?qft(
else 3Zaq#uA
insertSort(data, l, mid - l + 1); cbh#E)['
if ((r - mid) > THRESHOLD) o,CA;_
mergeSort(data, temp, mid + 1, r); 6R-C0_'h
else uhTKCR~
insertSort(data, mid + 1, r - mid); l~fh_IV1
*dG}R#9Nv
for (i = l; i <= mid; i++) { cVB|sYdf
temp = data; k_K,J6_)
} e+F}9HR7
for (j = 1; j <= r - mid; j++) { j(Fa=pi
temp[r - j + 1] = data[j + mid]; Q3BLL`W~
} 9QC"Od9H
int a = temp[l]; Y/^[qD
int b = temp[r]; |.Nr.4Yp
for (i = l, j = r, k = l; k <= r; k++) { rw5#e.~V
if (a < b) { JtYYT/PB
data[k] = temp[i++]; 1!>bhH}{D
a = temp; -}_cO|kk
} else { /63W\
data[k] = temp[j--]; waXDGdl0
b = temp[j]; cyGN3t9`.
} ?#BZ `H
} JNxW6 cK
} #aitESbT
WyBQ{H{So
/** `jb0+{08
* @param data ^o $W
* @param l &\"Y/b]
* @param i !B [1zE
*/ ]r/(n]=(
private void insertSort(int[] data, int start, int len) { MtZt8s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i!SW?\
} 4Q$j]U&b
} FG>;P]mvp
} 8^<c,!DM
} pAJ=f}",]E
j*;*Ka w
堆排序： Z7/vrME6
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package org.rut.util.algorithm.support; ~:/%/-^
o{{:|%m3Q
import org.rut.util.algorithm.SortUtil; 1-6gB@cvQ
;f".'9 l^
/** Xzx[C_G
* @author treeroot Exep+x-
* @since 2006-2-2 U;x1}eFT
* @version 1.0 '^Pq(b~
*/ (j8GiJ]{L,
public class HeapSort implements SortUtil.Sort{ u;+%Qh
?G4iOiyt
/* (non-Javadoc) c&Gz> L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kF(Ce{;z
*/ K,x$c %
public void sort(int[] data) { tr}KPdE
MaxHeap h=new MaxHeap(); K[Yc<Q
h.init(data); z3^RUoGU
for(int i=0;i h.remove(); ; @7
System.arraycopy(h.queue,1,data,0,data.length); eZ!yPdgy|
} f![xn2T
y!7B,
private static class MaxHeap{ ZhGh{D[,
Nl~Z,hT$*
void init(int[] data){ U/.w;DI
this.queue=new int[data.length+1]; Rz.i/wg}
for(int i=0;i queue[++size]=data; "t5 +*
fixUp(size); "2ZIoa!^
} qxf+#
} Q<RT12|`
8s QQK.N(
private int size=0; **T:eI+
/QrA8
private int[] queue; 'fS?xDs-v
JZ %`%rA
public int get() { v\fzO#vj
return queue[1]; gXq!a|eH
} kk 8R
t*o7,
public void remove() { E=;BI">.
SortUtil.swap(queue,1,size--); Xy[}Gp
fixDown(1); Z -pyFK\
} Qe2m8
file://fixdown tegOT]|
private void fixDown(int k) { c*.G]nRc
int j; D",A$(lG
while ((j = k << 1) <= size) { xM%H~(
if (j < size %26amp;%26amp; queue[j] j++; fkW3~b
if (queue[k]>queue[j]) file://不用交换 nURvy}<r
break; |*%/ovg+
SortUtil.swap(queue,j,k); OF-E6bc
k = j; w>v5oy8s-
} D35m5+=I
} M]J[6EW
private void fixUp(int k) { .KFA218h*x
while (k > 1) { l!\1,J:}Z
int j = k >> 1; IKvd!,0xf
if (queue[j]>queue[k]) k|^vCZ<(x
break; ,`D/sNP,q
SortUtil.swap(queue,j,k); B`LD7]ew
k = j; >-VWm A
} ~;}\zKQKE
} Lqg]Fd
kVWGDI$~
} $=\d1%_R|
grGhN q
} )qbI{^_g
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SortUtil： 1lbwJVY[
qO7fbql_
package org.rut.util.algorithm; +VwV5iy[`
l<$rqz3D
import org.rut.util.algorithm.support.BubbleSort; D`V6&_.p
import org.rut.util.algorithm.support.HeapSort; +z+F-
import org.rut.util.algorithm.support.ImprovedMergeSort; AeN 3<|RN
import org.rut.util.algorithm.support.ImprovedQuickSort; k - FB
import org.rut.util.algorithm.support.InsertSort; *f{7
import org.rut.util.algorithm.support.MergeSort; g+igxC}2z
import org.rut.util.algorithm.support.QuickSort; /d[Mss
import org.rut.util.algorithm.support.SelectionSort; 7`Qde!+C
import org.rut.util.algorithm.support.ShellSort; >+L7k^[,0
1d`cTaQ-
/** Ny[QT*nV
* @author treeroot (viWY
* @since 2006-2-2 bi+9R-=&
* @version 1.0 KCE=|*6::|
*/ 5n:nZ_D
public class SortUtil { g&Z"_7L~
public final static int INSERT = 1; N A8 sN
public final static int BUBBLE = 2; _jW>dU^B
public final static int SELECTION = 3; 9p5= _
public final static int SHELL = 4; %z30=?VL
public final static int QUICK = 5; P%iP:16
public final static int IMPROVED_QUICK = 6; :*=Ns[Y
public final static int MERGE = 7; iM8sX B
public final static int IMPROVED_MERGE = 8; Hyf"iYv+
public final static int HEAP = 9; {JXf*IJ
kl=xu3j
public static void sort(int[] data) { b,9@P&=:2
sort(data, IMPROVED_QUICK); 2v4W6R
} SBC~QD>L+
private static String[] name={ ?fB5t;~E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xj%,xm>}!u
}; FzVZs#O
lBS"3s384
private static Sort[] impl=new Sort[]{ g#w`J\iz
new InsertSort(), 5~QhX22
new BubbleSort(), tbg*_ZQO u
new SelectionSort(), 3eWJt\}?B
new ShellSort(), xF&6e&nv
new QuickSort(), ]}.0el{
new ImprovedQuickSort(), VXA[TIqp
new MergeSort(), f#1/}Hq/I
new ImprovedMergeSort(), {y1q7Z.M
new HeapSort() ti}f&w ICJ
}; Zgy7!AF!
XJc ,uj7
public static String toString(int algorithm){ C1tb`
return name[algorithm-1]; \Fq1^ 8qa
} hv3;irK]&
<Kg2$lu(_`
public static void sort(int[] data, int algorithm) { ><cU7 ja[^
impl[algorithm-1].sort(data); iM"asEU
} v_.HGGS
0JK2%%
public static interface Sort { +N7"EROc
public void sort(int[] data); w~]T<^fW~
} vf[&7n
\Y+")
public static void swap(int[] data, int i, int j) { w=|py>%
int temp = data; RJ@\W=aZ
data = data[j]; JwB"\&'1ZS
data[j] = temp; cu)U7
} -A}zJBcR
} Vu%n&uF