[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,G9t
} zwlz zqV
int i1=l; "(;t`,F
int i2=mid+1; o~'UWU'#
for(int cur=l;cur<=r;cur++){ MnW"ksH
if(i1==mid+1) 2$joM`j$
data[cur]=temp[i2++]; wqt/0,\
else if(i2>r) RWGAxq`9f
data[cur]=temp[i1++]; ((fFe8Rn)q
else if(temp[i1] data[cur]=temp[i1++]; B}d)e_uLj
else ].N%A07
data[cur]=temp[i2++]; #\O?|bN'q
} Qy'-3GB
} 3hR3)(+1
v<]$,V]
} h]^= y.Q
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改进后的归并排序: cq1)b\|
%T~LK=m
package org.rut.util.algorithm.support; F#l!LER^1g
2,'%G\QT
import org.rut.util.algorithm.SortUtil; (0S;eM&
{mB &xz:b
/** I oC}0C7
* @author treeroot BHIC6i%
* @since 2006-2-2 esHcE{GNOS
* @version 1.0 HVM(LHm=:
*/ NS^+n4
public class ImprovedMergeSort implements SortUtil.Sort { @@+BPLl
,) 3Eog\-
private static final int THRESHOLD = 10; h1QrFPQnu
:stA]JB# w
/* U$6(@&P!
* (non-Javadoc) 0"xD>ue&
* zFO#oW,D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h[j(@P
*/ |6zx YuX
public void sort(int[] data) { 1H7bPl|
int[] temp=new int[data.length]; Q~$hx{foN
mergeSort(data,temp,0,data.length-1); PQ4)kVT
} q-d#bKIf
E9PD1ADR
private void mergeSort(int[] data, int[] temp, int l, int r) { &l(PWU
int i, j, k; FKkL%:?
int mid = (l + r) / 2; V=5v7Y3(j
if (l == r) d<afO?"
return; G}gmkp]z
if ((mid - l) >= THRESHOLD) APL #-`XC
mergeSort(data, temp, l, mid); OmC F8:\/
else ]ZM-c~nL
insertSort(data, l, mid - l + 1); }#QYZ nR
if ((r - mid) > THRESHOLD) ev%}\^Vl[
mergeSort(data, temp, mid + 1, r); Id40yER
else J={IGA
insertSort(data, mid + 1, r - mid); 3q:>NB<
C(lGW,!
for (i = l; i <= mid; i++) { Tn(c%ytN
temp = data; VW*d*!
} W)m\q}]FYz
for (j = 1; j <= r - mid; j++) { Y8%*S%yO
temp[r - j + 1] = data[j + mid]; G}p*oz~
} Q[.HoqWK
int a = temp[l]; tAH0o\1;
int b = temp[r]; ])uhm)U@
for (i = l, j = r, k = l; k <= r; k++) { <B3$ODGJp
if (a < b) { 4Q n5Mr@<
data[k] = temp[i++]; +'QE-#%{=
a = temp; m #}%l3$
} else { sj\kp ni
data[k] = temp[j--]; -|nHwSrCZ/
b = temp[j]; <c$K3
} -/ h'uG
} ,T\)%q
} K"U[OZC`
bf1EMai"
/** Y<EdFzle
* @param data %q)*8
* @param l 2P4$^G[
* @param i leomm+f^
*/ EoD[,:*
private void insertSort(int[] data, int start, int len) { #>@~3kGg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -cW'g
} >@wyiBU
} EAi!"NJ
} /agX! E4s
} X9oxni#
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堆排序： [>N`)]fP
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package org.rut.util.algorithm.support; h8me.=S&
fF*{\
import org.rut.util.algorithm.SortUtil; E |BE(F;K
eH9Ofhsry
/** ,]UCq?YW)T
* @author treeroot .*zWm
* @since 2006-2-2 2IGoAt>V
* @version 1.0 ~gAp`Q
*/ lE@ V>%b
public class HeapSort implements SortUtil.Sort{ {j{H@rHuy
5o&noRIIr
/* (non-Javadoc) 4$^\s5K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '**dD2 n
*/ m5/d=k0l
public void sort(int[] data) { ;@R=CQ6
MaxHeap h=new MaxHeap(); wmQT$`$b
h.init(data); 5i42o+'
for(int i=0;i h.remove(); @ppT;9<d
System.arraycopy(h.queue,1,data,0,data.length); #uzp
} 3r]:k)J
5RysN=czA
private static class MaxHeap{ iE;D_m.>`O
#OT8_D
void init(int[] data){ lPywrTG0
this.queue=new int[data.length+1]; 'zg; *)x1/
for(int i=0;i queue[++size]=data; >ARZ=x[
fixUp(size); 1"4Pan
} sD!)=t_
} BS_ 3|
x&kM /z?/
private int size=0; :p@.aD5
WX9ABh&5
private int[] queue; LW$(;-rY
Zr%,F[j?
public int get() { H>qw@JiO!
return queue[1]; k)t_U3i
} aA|<W g
@3Lh/&
public void remove() { ,L.*95,
SortUtil.swap(queue,1,size--); z3bRV{{YqN
fixDown(1); +'lj\_n
} t6+c"=P#
file://fixdown ?m(]@6qa
private void fixDown(int k) { jgW-&nK!
int j; IOjp'6Yr
while ((j = k << 1) <= size) { 5!b+^UR;z
if (j < size %26amp;%26amp; queue[j] j++; 6VsgZ"Il
if (queue[k]>queue[j]) file://不用交换 @F-InfB8.
break; =Lc!L !(,b
SortUtil.swap(queue,j,k); hn-!W;j
k = j; >]!8f?,
} L/Ytkag
} jv4O
private void fixUp(int k) { d5z=fH9
while (k > 1) { i0TbsoKh:
int j = k >> 1; VK]cZ%)
if (queue[j]>queue[k]) "K9/^S_
break; dKk#j@[n"
SortUtil.swap(queue,j,k); ;J>upI
k = j; kF@Z4MB}yr
} cs]h+yE
} x@)G@'vV|
s;ivoGe}
} F4*ssx
h]>QGX[kC
} }mYxI^n
q?* z<)#
SortUtil： iCtDV5
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package org.rut.util.algorithm; BI|TM2oa
(B^rW,V[R
import org.rut.util.algorithm.support.BubbleSort; * @=ZzL
import org.rut.util.algorithm.support.HeapSort; ;xl0J*r
import org.rut.util.algorithm.support.ImprovedMergeSort; }`~n$OVx
import org.rut.util.algorithm.support.ImprovedQuickSort; +Zg@X.z
import org.rut.util.algorithm.support.InsertSort; 11((b
import org.rut.util.algorithm.support.MergeSort; qI%X/'
import org.rut.util.algorithm.support.QuickSort; XkhGU?={
import org.rut.util.algorithm.support.SelectionSort; jf^BEz5
import org.rut.util.algorithm.support.ShellSort; Ntt*}|:QV<
&~aS24c
/** 7C9_;81_Dt
* @author treeroot jcbq#
* @since 2006-2-2 ,(A $WT@e
* @version 1.0 kK|D&Xy`
*/ oMNSQMlI
public class SortUtil { @GWJq 3e
public final static int INSERT = 1; lv>^P>S(O
public final static int BUBBLE = 2; ictV7)
public final static int SELECTION = 3; (6*
public final static int SHELL = 4; ueyQ&+6r
public final static int QUICK = 5; f#kT?!sP
public final static int IMPROVED_QUICK = 6; #\8"d
public final static int MERGE = 7; #,9s\T
public final static int IMPROVED_MERGE = 8; 4nrn Npf`b
public final static int HEAP = 9; PbnAY{J
&/n*>%2
public static void sort(int[] data) { 3yrb7Rn3
sort(data, IMPROVED_QUICK); /Nkxb&
} cgi:"y F
private static String[] name={ PX*}.L *x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^ -4~pDv^
}; 7`f%?xVn0
>xXC=z+g]
private static Sort[] impl=new Sort[]{ %P7qA
new InsertSort(), r )HZaq
new BubbleSort(), U&ytZ7iB
new SelectionSort(), 15S&,$1&
new ShellSort(), I^nDO\m <
new QuickSort(), S1[, al
new ImprovedQuickSort(), U:z5`z!
new MergeSort(), pC]XbokES
new ImprovedMergeSort(), D4\[D8pD
new HeapSort() zW\s{
}; Sn0kJIb }
fwvwmZW
public static String toString(int algorithm){ \1SC:gN*#
return name[algorithm-1]; *7E#=xb
} O}w%$ mq
YS#*#!ZMn?
public static void sort(int[] data, int algorithm) { yVp,)T9
impl[algorithm-1].sort(data); ?5jLN&A3 G
} n|{#5#
N[e,%heR
public static interface Sort { eb}P/
public void sort(int[] data); t^KQ*8clG
} Ny^f'tsA
_FYA? d}
public static void swap(int[] data, int i, int j) { .whi0~i
int temp = data; ]c~yMA+]FZ
data = data[j]; =aZ d>{Y
data[j] = temp; o0]YDX@T
} DH yv^
} mmbe.$73