[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; 7/OOq=z
} o(SJuZC/U
int i1=l; Z-p^3t'{
int i2=mid+1; &$z1Hz+l
for(int cur=l;cur<=r;cur++){ a3 _0F@I
if(i1==mid+1) g$T_yT''
data[cur]=temp[i2++]; 1]3bx N
else if(i2>r) {e
data[cur]=temp[i1++]; ZE(RvPW
else if(temp[i1] data[cur]=temp[i1++]; Sl<-)a:
else NCM{OAjS5U
data[cur]=temp[i2++]; N8(x),
} .Zt/e>K&
} 0JRBNh
ZG[0rvW
} QEHZ=Yg%3
W6/p-e5y
改进后的归并排序: +#db_k
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package org.rut.util.algorithm.support; gGdYh.K&e5
]:#$6D"
import org.rut.util.algorithm.SortUtil; ds[Z=_Ll
kuud0VWJ
/** *U^I`j[u
* @author treeroot BH*]OXW\
* @since 2006-2-2 v%7JZ<I'A
* @version 1.0 IguG03:.N
*/ @dKf]&h%%
public class ImprovedMergeSort implements SortUtil.Sort { }N9a!,{P=b
]~M{@h!<
private static final int THRESHOLD = 10; 9*Twx&
m1; <T@
/* k 5r*?Os
* (non-Javadoc) v;qL?_:=c
* vHe.+XY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F"#*8P
*/ O xaua
public void sort(int[] data) { 4wD^?S!p
int[] temp=new int[data.length]; Q)X\VQcgj
mergeSort(data,temp,0,data.length-1); &J@ZF<Ib
} yWk:u 5
cCKda3v!O
private void mergeSort(int[] data, int[] temp, int l, int r) { R#bV/7Ol
int i, j, k; B=/=U7T
int mid = (l + r) / 2; &>4$ [m>n
if (l == r) 9U1!"/F
return; g#3x)97Z
if ((mid - l) >= THRESHOLD) |wn LxI
mergeSort(data, temp, l, mid); F7Yuky
else e14Q\
insertSort(data, l, mid - l + 1); I}0-
if ((r - mid) > THRESHOLD) I,?LZ_pK
mergeSort(data, temp, mid + 1, r); 5P2FNUKL
else 4qR Q,g{$T
insertSort(data, mid + 1, r - mid); ]b=A/*z
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for (i = l; i <= mid; i++) { G%/cV?18
temp = data; Y k6WSurw
} RXvcy<
for (j = 1; j <= r - mid; j++) { H$iMP.AK
temp[r - j + 1] = data[j + mid]; \/%Q PE8
} WW@"75t
int a = temp[l]; N5]68Fu'({
int b = temp[r]; HY#("=9< h
for (i = l, j = r, k = l; k <= r; k++) { 8(K~QvE~
if (a < b) { a2)*tbM9\
data[k] = temp[i++]; >'g60R[
a = temp; ATewdq[C
} else { m{Xf_rQ w
data[k] = temp[j--]; 5d;K.O
b = temp[j]; 4[j) $!l`
} w8Vzx8
} md_s2d
} \aRB
;G&O"S><]c
/** ~i {)J
* @param data TU6EE
* @param l ~a)20
* @param i r|$g((g
*/ "d*
private void insertSort(int[] data, int start, int len) { tXGcwoOB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); > _) a7%
} \05C'z3]
} KA[Su0
} ~z"->.u
} x6P^IkL:
2!`Z3>Oa
堆排序： A[Xw|9
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package org.rut.util.algorithm.support; ~$Yuxo
F<1'M#bl
import org.rut.util.algorithm.SortUtil; Ho9*y3]
~_6rD`2cJ
/** y!Eh /KD
* @author treeroot bJvRQrj*3
* @since 2006-2-2 cZi&L p
* @version 1.0 artS*fv3r
*/ N4FG_N
public class HeapSort implements SortUtil.Sort{ 'a9.JS[pj
u(qpdG||7
/* (non-Javadoc) Y*Rqgpu $
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hD=D5LYAZ
*/ 8 F 1ga15
public void sort(int[] data) { !"">'}E1
MaxHeap h=new MaxHeap(); #`EMK
h.init(data); P|4a}SWU
for(int i=0;i h.remove(); 3*L,48wX
System.arraycopy(h.queue,1,data,0,data.length); 'c]&{-w<i
} z#ET-[I
/;J;,G`?
private static class MaxHeap{ V!4E(sX
Oms`i&}"}
void init(int[] data){ ~'Hwszpb
this.queue=new int[data.length+1]; -rrg?4
for(int i=0;i queue[++size]=data; gNBI?xs`p
fixUp(size); r4'Pf|`u
} T~d';P
} Z%{2/mQ
e hGC N=
private int size=0; :DP{YL|x
QX/`s3N
private int[] queue; Y"U&3e,
L.(k8eX
public int get() { Z$gY}Bz
return queue[1]; P#]jPW
} AUd}) UR
=^{+h>#s@
public void remove() { {M5IJt"{4b
SortUtil.swap(queue,1,size--); -.G0k*[d
fixDown(1); (["u"m%
} uhLW/?q.
file://fixdown g [K8G
private void fixDown(int k) { EJsb{$u
int j; 3H2'HO
while ((j = k << 1) <= size) { NiF*h~q
if (j < size %26amp;%26amp; queue[j] j++; n~)%ou
if (queue[k]>queue[j]) file://不用交换 A1@a:P=
break; C.Yz<?;S
SortUtil.swap(queue,j,k); 0 $r{h}[^c
k = j; 5VS<I\o}
} UbXz`i
} xC]/i(+bA
private void fixUp(int k) { aeIR}'H|
while (k > 1) { g>{=R|uO5
int j = k >> 1; +-i@R%
if (queue[j]>queue[k]) s4\2lBU?
break; q}lSnWY[[
SortUtil.swap(queue,j,k); HvU)GJ u b
k = j; yCVBG
} /6fsh7 \
} hvwr!(|W
)XWL'':bF
} N[%IrN3
z%z$'m
} +xa2e?A%L
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SortUtil： G5Nub9_*X
_;9)^})$
package org.rut.util.algorithm; ~drNlt9jf
W3#L!&z_wK
import org.rut.util.algorithm.support.BubbleSort; 5Dd;?T>
import org.rut.util.algorithm.support.HeapSort; 6\L,L&
import org.rut.util.algorithm.support.ImprovedMergeSort; VEk|lX;2
import org.rut.util.algorithm.support.ImprovedQuickSort; .)Q'j94Q
import org.rut.util.algorithm.support.InsertSort; >jIc/yEYKI
import org.rut.util.algorithm.support.MergeSort; e~1??k.;=
import org.rut.util.algorithm.support.QuickSort; }OZfsYPz}T
import org.rut.util.algorithm.support.SelectionSort; d p].FS
import org.rut.util.algorithm.support.ShellSort; qp8;=Nfa
x :s-\>RcA
/** 3zkq'lZ
* @author treeroot d4U_Wu&
* @since 2006-2-2 aE}u5L$#
* @version 1.0 {Ffr l(*
*/ bk2vce&
public class SortUtil { \_oHuw
public final static int INSERT = 1; YR>xh2< 9
public final static int BUBBLE = 2; fQ@["b
public final static int SELECTION = 3; 8w4.|h5FP
public final static int SHELL = 4; 9(Z)c
public final static int QUICK = 5; QGa"HG5NF
public final static int IMPROVED_QUICK = 6; -3C~}~$>`
public final static int MERGE = 7; . Hw^Nx
public final static int IMPROVED_MERGE = 8; H Zc;.jJ
public final static int HEAP = 9; iD9GAe}x
kE1u-EA
public static void sort(int[] data) { R~o?X^^O
sort(data, IMPROVED_QUICK); qohUxtnTK>
} ay2.CBF
private static String[] name={ pAYuOk9n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {chl+au*l
}; g~]FI
W/+0gh7`,(
private static Sort[] impl=new Sort[]{ }5|uA/B
new InsertSort(), EJZ2V>\_-0
new BubbleSort(), Ec|#i
new SelectionSort(), 0<!BzG
new ShellSort(), fa)G$Q
new QuickSort(), Ngr7E
new ImprovedQuickSort(), D<:9pLD(
new MergeSort(), >:.Bn8-
new ImprovedMergeSort(), `R\0g\
new HeapSort() :?zOLw?(
}; 1*s Lj#
@d)6LA9Ec
public static String toString(int algorithm){ q;U[f6JjE
return name[algorithm-1]; I2b[
} &WIPz\
!GO4cbdQ
public static void sort(int[] data, int algorithm) { N?aU<-Tn
impl[algorithm-1].sort(data); #qzozQ4
} giv cq'L
3;&N3:,X
public static interface Sort { p AD@oPC
public void sort(int[] data); crUXpD
} dS-l2 $n
2Tp.S3
public static void swap(int[] data, int i, int j) { :`d& |BB
int temp = data; +=*ZH`qX
data = data[j]; F2#^5s(
data[j] = temp; (RQ kwu/
} V\A?1
} H}d&>!\}F