[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; Kr]z]4.d@
} kutJd{68
int i1=l; YQYX,b
int i2=mid+1; "W5rx8a
for(int cur=l;cur<=r;cur++){ lov%V*tL
if(i1==mid+1) hl<y4y&|
data[cur]=temp[i2++]; r%|A$=[Q
else if(i2>r) xG1?F_]
data[cur]=temp[i1++]; `c9'0*-
else if(temp[i1] data[cur]=temp[i1++]; M$H`^Pv
else AuXs B
data[cur]=temp[i2++]; jM@?<1
} V'I T1~
} D"!jbVz]*
U<rI!!#9
} P$OUi!"
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改进后的归并排序: tDt :^Bc
1x{kl01m%
package org.rut.util.algorithm.support; _C$X04bU3V
qe%V#c
import org.rut.util.algorithm.SortUtil; CdL.?^
ot }6D
/** #1gO?N(<=
* @author treeroot |z*>ixK
* @since 2006-2-2 3ev-Iqz
* @version 1.0 (hN?:q?'
*/ #kci=2q_
public class ImprovedMergeSort implements SortUtil.Sort { $w/E9EJ)3A
Oyan9~
private static final int THRESHOLD = 10; d@ (vg
QD4:W"i
/* Du!._
* (non-Javadoc) yLqF ,pvO
* b i~=x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +GeWg` \=
*/ 2M&$Wuu.q
public void sort(int[] data) { 95LyYg
int[] temp=new int[data.length]; 9`Vc
mergeSort(data,temp,0,data.length-1); jT-<IJh!o
} V{ |[oIp
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private void mergeSort(int[] data, int[] temp, int l, int r) { q:]Q% IC^
int i, j, k; =$&&[&
int mid = (l + r) / 2; qrE0H
if (l == r) !iJipe5
return; :c:V%0Yji
if ((mid - l) >= THRESHOLD) .&|L|q}
mergeSort(data, temp, l, mid); :,~K]G
else <u0,Fp
insertSort(data, l, mid - l + 1); n[CoS
if ((r - mid) > THRESHOLD) M*`hDdS
mergeSort(data, temp, mid + 1, r); 6 64q~_@B1
else 7n&yv9"
insertSort(data, mid + 1, r - mid); U&W"Ea=R/
H=<LutnZ
for (i = l; i <= mid; i++) { F#|Z# Mu
temp = data; RRzP*A%=
} fGarUV
for (j = 1; j <= r - mid; j++) { T1zi0fa'
temp[r - j + 1] = data[j + mid]; ="(>>C1-
} MGaiTN^_<
int a = temp[l]; +zp0" ,2B
int b = temp[r]; .iT4-
for (i = l, j = r, k = l; k <= r; k++) { &S-er{]]
if (a < b) { ;4kT?3$l
data[k] = temp[i++]; g~)3WfC$[
a = temp; &*gbK6JB
} else { QBihpA1;
data[k] = temp[j--]; ^l(^z fsZ
b = temp[j]; ^P$7A]!
} HeozJ^u\?
} $[z<oN_Q
} ?cK]C2Ak
$5A^'q
/** ,g|2NjUAc
* @param data i}lRIXjdV
* @param l >];"N{ A
* @param i [h-norB((
*/ kEP<[K
private void insertSort(int[] data, int start, int len) { niWx^gKb$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pm?B 9S
} T*+A.G@L"
} C}Qt "-%
} (STx$cya
} vYnftJK&
mi^hvks<
堆排序： S^j,f'2
jQ$BPEG&X
package org.rut.util.algorithm.support; zP nC=h|g
h(N=V|0
import org.rut.util.algorithm.SortUtil; Uw <{i
M-Sv1ZLh
/** :Q-F9o J
* @author treeroot XU9'Rfp
* @since 2006-2-2 9o_-=>(
* @version 1.0 yL&/m~{s
*/ ;k}H(QI
public class HeapSort implements SortUtil.Sort{ RL&lKHA
OKPJuV`y6
/* (non-Javadoc) _tWE8r,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GV6mzD@<
*/ q-IWRb0j%a
public void sort(int[] data) { v8'5pLt"
MaxHeap h=new MaxHeap(); >S.91!x
h.init(data); =x H~ww (D
for(int i=0;i h.remove(); 6N3@!xtpi
System.arraycopy(h.queue,1,data,0,data.length); %),!2_ x~
} *s\sa+2al
/80YZ
private static class MaxHeap{ D^$OCj\
P4 6,o
void init(int[] data){ K\^&+7&zVg
this.queue=new int[data.length+1]; rBfg*r`)
for(int i=0;i queue[++size]=data; GAp!nix6h
fixUp(size); LdEE+"Jw
} VQ<5%+
} VGZ6
qd(hQsfqYU
private int size=0; Ub)M*Cq0(o
yekRwo|
private int[] queue; ]>8)|]O6n
dtTlIhh1V
public int get() { ~6d5zI4\
return queue[1]; 3cThu43c
} .Dx2 ;lj
}cW#045es
public void remove() { T2|:nC)@
SortUtil.swap(queue,1,size--); ML=z<u+
fixDown(1); ^:z7E1~
} f3&/r
file://fixdown |!Ists
private void fixDown(int k) { A.U'Q|
int j; fU ={a2
while ((j = k << 1) <= size) { IG|\:Xz
if (j < size %26amp;%26amp; queue[j] j++; sTOFw;v%
if (queue[k]>queue[j]) file://不用交换 hdj%|~Fj
break; MaErx\
SortUtil.swap(queue,j,k); TzrW
k = j; &+- e
} v#Upw\!
} nh;y:Bi
private void fixUp(int k) { #r}uin*jD
while (k > 1) { =v0~[E4
int j = k >> 1; xb`CdtG2.
if (queue[j]>queue[k]) S@A<6
break; or.\)(m#(
SortUtil.swap(queue,j,k); 5"gL.Ez
k = j; rzT{-DZB[4
} all*P #[X
} ]M\q0>HoJ
iZC`z }
} cL7C2wB`
c F=P!2@
} SQ<f
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SortUtil： jY+Do:#/wO
4J8Dh;a`
package org.rut.util.algorithm; Cuv|6t75'
4J}3,+
import org.rut.util.algorithm.support.BubbleSort; L[.<o{
import org.rut.util.algorithm.support.HeapSort; rr )/`Kmv%
import org.rut.util.algorithm.support.ImprovedMergeSort; u){S$</
import org.rut.util.algorithm.support.ImprovedQuickSort; ~U%j{8uH
import org.rut.util.algorithm.support.InsertSort; |j# ^@R
import org.rut.util.algorithm.support.MergeSort; kfK[u/<i
import org.rut.util.algorithm.support.QuickSort; (9'be\
import org.rut.util.algorithm.support.SelectionSort; Yb9cW\lr
import org.rut.util.algorithm.support.ShellSort; Zs73 ad
8A4TAT4,
/** 3#mE( `|P
* @author treeroot [gn[nP9
* @since 2006-2-2 vHc#m@4o
* @version 1.0 3+zzi
*/ Tk](eQsy.v
public class SortUtil { PUKVn+h
public final static int INSERT = 1; d?}hCo=/Xq
public final static int BUBBLE = 2; #ovM(Mld
public final static int SELECTION = 3; xVTo4-[p
public final static int SHELL = 4; 2Fq=jOA)z$
public final static int QUICK = 5; A^L?_\e6
public final static int IMPROVED_QUICK = 6; uMpl#N p
public final static int MERGE = 7; ay-9c2E
public final static int IMPROVED_MERGE = 8; ' &N20w
public final static int HEAP = 9; cNeiD@t3V&
KBj@V6Q
public static void sort(int[] data) { ~'{VaYk]v
sort(data, IMPROVED_QUICK); SwJHgZ&
} r\RFDj
private static String[] name={ hXTYTbTX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q@Dkl F
}; )Y8qWJU
8})|^%@n
private static Sort[] impl=new Sort[]{ OPLl*bnf
new InsertSort(), 9tAE#A
new BubbleSort(), B!iFmkCy
new SelectionSort(), FE}s#n_Pd
new ShellSort(), kyu2)L2u
new QuickSort(), oN ;-M-(
new ImprovedQuickSort(), L6xB`E9
new MergeSort(), f-&ATTx`J
new ImprovedMergeSort(), "u5KbJW
new HeapSort() SdSgn|S
}; (gDQ\t@3-
yZ|+VXO
public static String toString(int algorithm){ $':JI#
return name[algorithm-1]; 1wlVz#f.
} }pKv.
~f .y:Sbb
public static void sort(int[] data, int algorithm) { 6N?#b66
impl[algorithm-1].sort(data); W7$s5G,
} ",QYDFFeF
VZTmzIk.Y
public static interface Sort { A`IHP{aB
public void sort(int[] data); Ej{+U
} Xout:dn
e) ]RA?bF
public static void swap(int[] data, int i, int j) { D/cg7
int temp = data; dDo6fP2
data = data[j]; ,!r@9T
data[j] = temp; ^K"ZJ6?+1
} :q(D(mK
} Ca X^)