[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; BEx? bf@|]
} \&`S~cV9
int i1=l; H.hF`n
int i2=mid+1; >>Z.]
for(int cur=l;cur<=r;cur++){ xD,BlDV
if(i1==mid+1) "b8<C>wY
data[cur]=temp[i2++]; z^T/kK3I
else if(i2>r) :&HrOdz
data[cur]=temp[i1++]; >93vMk~hU
else if(temp[i1] data[cur]=temp[i1++]; /w^}(IJ4
else 8Sd<!
data[cur]=temp[i2++]; ?gY^,Ckj
} {k%*j 4
} `6)GjZh^
0+}42g|_Z
} Cz-eiPlq
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改进后的归并排序: <3m_} =\
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package org.rut.util.algorithm.support; 3E$M{l
%(MaH
import org.rut.util.algorithm.SortUtil; 6.ASLH3#
casva;
/** PB_+:S^8
* @author treeroot B<u6Z!Pp2
* @since 2006-2-2 *8M0h9S$
* @version 1.0 <kN4@bd;
*/ / Of*II&
public class ImprovedMergeSort implements SortUtil.Sort { J70#pF
(, /`*GC
private static final int THRESHOLD = 10; __fa,kK{?
)q8w+'z
/* JcL4q\g
* (non-Javadoc) :3pJGMv(
* V##=-KZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Iy<iV
*/ xeF0^p7Z
public void sort(int[] data) { c Owa^;
int[] temp=new int[data.length]; RSC^R}a5
mergeSort(data,temp,0,data.length-1); NGcd
} SU~t7Ta!G
wmAZ {
private void mergeSort(int[] data, int[] temp, int l, int r) { zePVB-@u
int i, j, k; 2a|9D\
int mid = (l + r) / 2; As }:~Jy|
if (l == r) FNL[6.!PV
return; ?{[ISk)
if ((mid - l) >= THRESHOLD) M{cF14cQ
mergeSort(data, temp, l, mid); k&wCa<Rs~R
else l2vIKc
insertSort(data, l, mid - l + 1); dmI~$*
if ((r - mid) > THRESHOLD) +:k Iq
mergeSort(data, temp, mid + 1, r); r"sK@
else C62:G+W&o
insertSort(data, mid + 1, r - mid); &TJMopVn
X|zQZ<CO
for (i = l; i <= mid; i++) { e&sZ]{uD
temp = data; :,Z'/e0&
} >-J%=P
for (j = 1; j <= r - mid; j++) { _;L%? -2c
temp[r - j + 1] = data[j + mid]; }Q&zYC]d
} h\| ~Q.kG
int a = temp[l]; *(wkgn
int b = temp[r]; > Dy<@e
for (i = l, j = r, k = l; k <= r; k++) { ix4O-o{
if (a < b) { <qJI]P
data[k] = temp[i++]; FcVQ_6
a = temp; O{b<UP'85
} else { sA$x2[*O
data[k] = temp[j--]; 6a6;]lsG
b = temp[j]; sdN@ZP
} cCx@VT`0
} +yYxHIOZ(
} OH.^m6Z
9Rl-Jz8g
/** B=14 hY@`
* @param data T'_#Dwmj*
* @param l 7[z^0?Pygf
* @param i 5:y\ejU
*/ S:2M9nC
private void insertSort(int[] data, int start, int len) { _=0%3Sh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )45~YDS;t
} cHo@F!{o=
} ?+Gc.lU
} 1<|\df.
} -KV)1kET
sNB*S{
堆排序： vd<r}3i*
X!H[/b:1O
package org.rut.util.algorithm.support; @jh\yjrW
]JDKoA{S0
import org.rut.util.algorithm.SortUtil; %G6Q+LMwm
%!DdjC&5*
/** Ac^hZ.qPz
* @author treeroot ox:m;-Ml?_
* @since 2006-2-2 pHKcKqB*13
* @version 1.0 CCoT
*/ WxPu{N
public class HeapSort implements SortUtil.Sort{ *^[m?3"W
@yV.Yx"p_
/* (non-Javadoc) gn82_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hA=.${uIO
*/ WO;2=[#O;
public void sort(int[] data) { lU?8<X
MaxHeap h=new MaxHeap(); /Ne;Kdp
h.init(data); $ljzw@k
for(int i=0;i h.remove(); Nm{|
System.arraycopy(h.queue,1,data,0,data.length); 1fgO3N
} i ZU1w7Z
unX mMSz(
private static class MaxHeap{ pW4O[v`
xWRkg$A
void init(int[] data){ T-MC|>pv
this.queue=new int[data.length+1]; <Wrn/%tL
for(int i=0;i queue[++size]=data; I{nrOb1G(
fixUp(size); q,;8Ka )
} S?Y%}
} oS>VN<
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private int size=0; DP@F-Q4
jJ.isr|`
private int[] queue; ATRB9
wWYo\WH'
public int get() { gh9Gc1tKt
return queue[1]; Pzt5'O@dA
} \9t/*%:
x)+ q$FB
public void remove() { " fXs!
SortUtil.swap(queue,1,size--); Pk?M~{S
fixDown(1); 4H9mKR
} i<\WRzVT
file://fixdown #'y4UN
private void fixDown(int k) { F ?N+ __o
int j; _a]0<Vm C0
while ((j = k << 1) <= size) { evSr?ys
if (j < size %26amp;%26amp; queue[j] j++; } "QL"%
if (queue[k]>queue[j]) file://不用交换 Wf!u?nH.5
break; $y$E1A6h+
SortUtil.swap(queue,j,k); Z Jgy!)1n
k = j; '_q&~M{
} TI5<' U)
} k,,Bf-?
private void fixUp(int k) { D[p_uDIz
while (k > 1) { l=&\luNz
int j = k >> 1; ZrNBkfe:
if (queue[j]>queue[k]) qV{iUtYt
break; fphi['X
SortUtil.swap(queue,j,k); /OD@Xl];K
k = j; MV.&GUez{
} SD_P=?
} h"}c_lY9
u> @@
} %/n#{;c#
H|%'$oWp
} T`$!/BlZ
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SortUtil： r=gF&Og,?
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package org.rut.util.algorithm; BAIR!
JZup} {a
import org.rut.util.algorithm.support.BubbleSort; 7lUnqX.
import org.rut.util.algorithm.support.HeapSort; MA,7|s
import org.rut.util.algorithm.support.ImprovedMergeSort; ()MUyW"S#`
import org.rut.util.algorithm.support.ImprovedQuickSort; L3;cAb/
import org.rut.util.algorithm.support.InsertSort; /{R>o0oW
import org.rut.util.algorithm.support.MergeSort; S*l=FRFI
import org.rut.util.algorithm.support.QuickSort; =G\N1E
import org.rut.util.algorithm.support.SelectionSort; `E2RW{$A
import org.rut.util.algorithm.support.ShellSort; Oa-(Xp,n#
RW`+F|UbE
/** T9NTL\;
* @author treeroot bQgtZHO
* @since 2006-2-2 0`QF:
* @version 1.0 h+DK .$
*/ c#zx" ,K
public class SortUtil { QTIC5cl,
public final static int INSERT = 1; !d Z:Ih.[{
public final static int BUBBLE = 2; [R0E4A?M
public final static int SELECTION = 3; <4:%M
public final static int SHELL = 4; fR&x5Ika0
public final static int QUICK = 5; X1XmaO%A
public final static int IMPROVED_QUICK = 6; ">FuCvQ
public final static int MERGE = 7; qFE(H1hy
public final static int IMPROVED_MERGE = 8; Mi<l;ZP
public final static int HEAP = 9; 06]%$-j
R ~?9+
public static void sort(int[] data) { yvCX is
sort(data, IMPROVED_QUICK); \AOHZ r
} \R[f< K%
private static String[] name={ cqG&n0zb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /0YO`])"
}; :h8-y&;
Gp0yRT.
private static Sort[] impl=new Sort[]{ zP8rW5/
new InsertSort(), ne|N!!Dmk
new BubbleSort(), @(CJT-Ak
new SelectionSort(), E$C0\O!7
new ShellSort(), m%%\k \
new QuickSort(), VmON}bb[zz
new ImprovedQuickSort(), Z8I0v$LjR
new MergeSort(), =rN_8&
new ImprovedMergeSort(), 9Pql\]9"o
new HeapSort() 6KE?@3;Om
}; U>hpYqf_
UO(?EELm
public static String toString(int algorithm){ Rm[{^V.Z$
return name[algorithm-1]; 2*@@Bw.XA
} 5H2Ugk3
],F@.pg
public static void sort(int[] data, int algorithm) { ,zOv-pH
impl[algorithm-1].sort(data); si1Szmx,
} PouWRGS_
2gJkpf9JN
public static interface Sort { (mgv:<c;BA
public void sort(int[] data); QV>hQ]L
} Zvkb=
!@T5](zV
public static void swap(int[] data, int i, int j) { LMaY}m>
int temp = data; MDauHtF,
data = data[j]; h\/T b8
data[j] = temp; Ey&gZ$|&
} oAF#bj_f
} 3vj1FbY