[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; fMLm_5(H
} \:"s*-
int i1=l; ,"}'NH@
int i2=mid+1; g<.VW0
for(int cur=l;cur<=r;cur++){ pu`|HaQaE
if(i1==mid+1) zo]7#
data[cur]=temp[i2++]; gQ/zk3?k
else if(i2>r) <'B`b
data[cur]=temp[i1++]; '-ACNgNn
else if(temp[i1] data[cur]=temp[i1++]; y4envjl0
else YjG0: 9
data[cur]=temp[i2++]; !_V*VD
} *M KVm)Iv
} }-8K*A3
=ohdL_6
} |4-Ey! P
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改进后的归并排序: `CHgTkv
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package org.rut.util.algorithm.support; >xH3*0Lp
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import org.rut.util.algorithm.SortUtil; %oN^1a'&)
B`KpaE]
/** N8mK^{
* @author treeroot Dy8Go4
* @since 2006-2-2 c?z%z&
* @version 1.0 u`
*/ =@ON>SmPs
public class ImprovedMergeSort implements SortUtil.Sort { Vuz!~kLYIn
uswz@ [pa
private static final int THRESHOLD = 10; uHwuw_eK`
Kk??}
/* l sUQ7%f
* (non-Javadoc) E2dSOZS:)%
* s]=kD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =zbrXtp,
*/ ~%sDQt\S
public void sort(int[] data) { U;{VL!
int[] temp=new int[data.length]; @c.QrKSaD
mergeSort(data,temp,0,data.length-1); ]n!pn#Q
} ~}TVM%0RTq
6%fU}si,
private void mergeSort(int[] data, int[] temp, int l, int r) { 'MC)%N,
int i, j, k; {qh`8
int mid = (l + r) / 2; `Y+p7*Qr2
if (l == r) Lqz}h-Ei
return; KL -8Aj~
if ((mid - l) >= THRESHOLD) QMkLAZ
mergeSort(data, temp, l, mid); Be}Cj(C
else &uk?1Z#j
insertSort(data, l, mid - l + 1); 7eu7ie6
if ((r - mid) > THRESHOLD) ..n-&(c32
mergeSort(data, temp, mid + 1, r); Lx(Y=
else N(F9vZOs
insertSort(data, mid + 1, r - mid); Zb}=?fcL;@
WRD^S:`BH
for (i = l; i <= mid; i++) { ,9q5jOnk
temp = data; }.e*=/"MB
} 7(wY4T
for (j = 1; j <= r - mid; j++) { |n* I}w^
temp[r - j + 1] = data[j + mid]; sd#a_
} R#Ss_y
int a = temp[l]; Ee4oTU5Mb
int b = temp[r]; 9/Q5(P
for (i = l, j = r, k = l; k <= r; k++) { y'Wz*}8pr
if (a < b) { LoNz 1KJL
data[k] = temp[i++]; qzV:N8+,`
a = temp; n {^D_S
} else { Jd)|==yD
data[k] = temp[j--]; {AQ3y,sh
b = temp[j]; 6``!DMDt/P
} NlWIb2,
} C+2*m=r
} Vx?a&{3]-
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/** {fk'g(E8([
* @param data Rz%+E0
* @param l }0qgvw
* @param i p6I@o7f
*/ V"\t
private void insertSort(int[] data, int start, int len) { 6Pd;I,k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2sWM(SN
} >_tn7Z0L
} C\ 9eR
} 9<,\+}^{
} s_p?3bKu
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堆排序： M0n@?S
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package org.rut.util.algorithm.support; o'r?^ *W
9?@M Zh
import org.rut.util.algorithm.SortUtil; /ey}#SHm,
zjB8~ku#
/** >`\~=ivrD
* @author treeroot lYD-U8
* @since 2006-2-2 #L[Atx
* @version 1.0 g$9Yfu
*/ 9boNB"h]T
public class HeapSort implements SortUtil.Sort{ zTm&m#){3A
jSpmE
/* (non-Javadoc) 57D /"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8T7[/"hi\
*/ 7n}J}8Y*U2
public void sort(int[] data) { #k5Nnv#(J
MaxHeap h=new MaxHeap(); B]0`b1t
h.init(data); ^Jsx^?
for(int i=0;i h.remove(); 0P&rTtU6
System.arraycopy(h.queue,1,data,0,data.length); Kcl>uAgU
} XwE(&ZCf'b
*8t_$<'dQ
private static class MaxHeap{ $x#Y\dpS
D3|y|Dr
void init(int[] data){ Z^>{bW
this.queue=new int[data.length+1]; .G4(Ryh
for(int i=0;i queue[++size]=data; *Xn{{
fixUp(size); 349W0>eOT
} UuzT*Y>
} gW$X8ECX
7[.aAGTZ;
private int size=0; i4JqU\((]
$0+AR)
private int[] queue; OZB(4{vnyC
Myg &H(~
public int get() { w0q.cj@nd
return queue[1]; Uf1i"VY
} DUFfk6#X}
iYEhrb
public void remove() { 3#!}W#xv
SortUtil.swap(queue,1,size--); !Z3iu
fixDown(1); ~C\R!DN,
} JS1$l+1
file://fixdown Y1h8O%?
private void fixDown(int k) { Mxc0=I'a
int j; dmgoVF_qR
while ((j = k << 1) <= size) { [u`v'*0d
if (j < size %26amp;%26amp; queue[j] j++; ?h2!Z{[0b
if (queue[k]>queue[j]) file://不用交换 #/=s74.b
break; :*4b,P
SortUtil.swap(queue,j,k); wrSw>sE"
k = j; Y`eUWCD
} |:7O
} *UJ.cQ}
private void fixUp(int k) { |08b=aR6ro
while (k > 1) { +*Y/+.4WE$
int j = k >> 1; VEj-%"\
if (queue[j]>queue[k]) "j#;MOK
break; nd_+g2x'
SortUtil.swap(queue,j,k); ?Imq4I~)
k = j; dT?/9JIv
} j>Ce06G
} D"UCe7
OE[|1?3
} I.As{0cc
us%dw&
} Osz:23(p
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SortUtil： #29m <f_n
A/:^l%y,GZ
package org.rut.util.algorithm; ,Q:Ylc8
W/e6O??O
import org.rut.util.algorithm.support.BubbleSort; pbc<326X"
import org.rut.util.algorithm.support.HeapSort; Y<0}z>^
import org.rut.util.algorithm.support.ImprovedMergeSort; jNV)=s^ed[
import org.rut.util.algorithm.support.ImprovedQuickSort; Z'=:Bo{
import org.rut.util.algorithm.support.InsertSort; .xG3`YH
import org.rut.util.algorithm.support.MergeSort; OynQlQD/Eu
import org.rut.util.algorithm.support.QuickSort; CNU,\>J@$
import org.rut.util.algorithm.support.SelectionSort; 2aj9:S
import org.rut.util.algorithm.support.ShellSort; %BBM%Lj
KNvvYwFH]
/** 9feVy\u
* @author treeroot L?h'^*F H}
* @since 2006-2-2 KAkD" (!
* @version 1.0 I!-"SuBy4J
*/ yzI`&? P2
public class SortUtil { )O}q{4,}
public final static int INSERT = 1; ,/%@:Fh4
public final static int BUBBLE = 2; WlJ=X$
public final static int SELECTION = 3; cpLlkR O
public final static int SHELL = 4; NQ&\t[R[
public final static int QUICK = 5; r3OR7f[
public final static int IMPROVED_QUICK = 6; ZsnFuk#W
public final static int MERGE = 7; F$6JzF$|F
public final static int IMPROVED_MERGE = 8; ~[@gu,Wb
public final static int HEAP = 9; !E@4^A80\W
T1*%]6&V|
public static void sort(int[] data) { m+!T $$W
sort(data, IMPROVED_QUICK); ASU.VY
} AY x*Ngn
private static String[] name={ EGMIw?%Y`-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 23p1Lb9P
}; ^h?]$P
nl)l:A+q8
private static Sort[] impl=new Sort[]{ h1 npaD!
new InsertSort(), A)%!9i)
new BubbleSort(), p6c&vEsNj
new SelectionSort(), IgyoBfj\d
new ShellSort(), s9rKXY',:l
new QuickSort(), %'w?fqk
new ImprovedQuickSort(), PpLuN12H
new MergeSort(), BVzMgn;
new ImprovedMergeSort(), $W;f9k@C!
new HeapSort() G0Y]-*1
}; b*)F7{/Z
,(3oAj\
public static String toString(int algorithm){ Qf($F,)K
return name[algorithm-1]; 4DgH/Yo
} QAzwNXE+
7e:eL5f>~
public static void sort(int[] data, int algorithm) { _;mA(j
impl[algorithm-1].sort(data); ZJ8"5RW
} A~X| vW
j8)rz
public static interface Sort { <nU8.?\?~
public void sort(int[] data); s4`,Z*H
} 7{lWg x
`-w,6
public static void swap(int[] data, int i, int j) { tGJJ|mle>
int temp = data; l:+$Ks
data = data[j]; 2. q\!V}yQ
data[j] = temp; j6WDh}#
} &!F"3bD0
} W3gHzT?{