[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; G<;~nAo?f0
} T{k P9 4
int i1=l; <v:VA!]
int i2=mid+1; z-5`6aE9<
for(int cur=l;cur<=r;cur++){ tnRf!A;m
if(i1==mid+1) oJz2-PmX
data[cur]=temp[i2++]; 5i!Q55Yv=,
else if(i2>r) 3!"N;Q"
data[cur]=temp[i1++]; )/H;5 cn
else if(temp[i1] data[cur]=temp[i1++]; >='/%Ad
else $YL9 vJV
data[cur]=temp[i2++]; g* q#VmE
} E.oJ[;
} GXtMX ha,
jFj11w1FrA
} K4c:k; V
Jz}nV1G(jz
改进后的归并排序: #DTKz]i?
.+9hm|
package org.rut.util.algorithm.support; *@2Bh4
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import org.rut.util.algorithm.SortUtil; K p3}A$uV
tIsWPt]Y
/** t]yxLl\
* @author treeroot OXEk{#Uf[3
* @since 2006-2-2 Z2%HQL2
* @version 1.0 zM9#1^X
*/ =)[m[@,c
public class ImprovedMergeSort implements SortUtil.Sort { v= 55{
HN5m%R&`
private static final int THRESHOLD = 10; Td=4V,BN
8\n3 i"
/* nw+~:c
* (non-Javadoc) )h{&O ,s
* )`\hK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xY^sC56Z
*/ )g0lI
public void sort(int[] data) { h0GoF A<
int[] temp=new int[data.length]; @I_cwUO
mergeSort(data,temp,0,data.length-1); I{Zb/}k-
} RLmOg{L
8+zW:0"[
private void mergeSort(int[] data, int[] temp, int l, int r) { 3db{Tcn\@]
int i, j, k; w?Te%/s.
int mid = (l + r) / 2; V]=22Cxi'~
if (l == r) g{8RPw]
return; f98,2I(>`+
if ((mid - l) >= THRESHOLD) $ V^gFes
mergeSort(data, temp, l, mid); oxwbq=a6yV
else vl"w,@V7
insertSort(data, l, mid - l + 1); K$CC ~,D
if ((r - mid) > THRESHOLD) zC?'Qiuh*
mergeSort(data, temp, mid + 1, r); p=8Qv
else C@(@n!o:!
insertSort(data, mid + 1, r - mid); ZU4=&K
v"*r %nCi
for (i = l; i <= mid; i++) { a:FU- ^B4~
temp = data; O-?rFNavxp
} IH|zNg{\Y
for (j = 1; j <= r - mid; j++) { TI>5g(:3\
temp[r - j + 1] = data[j + mid]; r\NqY.U&
} qu=~\t1[6
int a = temp[l]; Xs03..S
int b = temp[r]; Tz @<hE
for (i = l, j = r, k = l; k <= r; k++) { +! 1_Mt6
if (a < b) { 1d^~KBfv
data[k] = temp[i++]; oD)x\ )t8
a = temp; uEPp%&D.+
} else { rQ*+ <`R}
data[k] = temp[j--]; aLk3Yg@X
b = temp[j]; b<h((]Q>^
} 4:/]Y=)x
} V!}I$JiJ
} ]RVu[k8
bnxp[Qk|5
/** 1p&.\^
* @param data 5100fX}
* @param l {K^5q{u
* @param i bz*@[NQ
*/ 'L/)9.29
private void insertSort(int[] data, int start, int len) { 2/-m-5A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yuv(4a<M%
} lhUGo =
} E=NjWO
} Gu;40)gm
} U/>I! 7oe
O=K lc+Oo
堆排序： _u]Z+H"
92TuuN#{
package org.rut.util.algorithm.support; FFT)m^4p.
x39tnf/F
import org.rut.util.algorithm.SortUtil; `M@ESA(e
p=+Y7NE)
/** [(X~C*VdxM
* @author treeroot 5'!fi]Z
* @since 2006-2-2 1+%UZK= K
* @version 1.0 hY)zKX_r
*/ Q2CGC+
public class HeapSort implements SortUtil.Sort{ d59rq<yI
K1 f1T
/* (non-Javadoc) R iZ)FW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E|=x+M1sH
*/ gS(3m_
public void sort(int[] data) { CL<-3y*
MaxHeap h=new MaxHeap(); qq)5)S
h.init(data); ZflB<cI
for(int i=0;i h.remove(); s_^`t+5
System.arraycopy(h.queue,1,data,0,data.length); |d0X1(
} [^"}jbn/
=?]`Xo,v~
private static class MaxHeap{ ,Yag! i>;
RDps{),E;d
void init(int[] data){ k>i88^kPV
this.queue=new int[data.length+1]; S|tD8A
for(int i=0;i queue[++size]=data; Z%~}*F}7X
fixUp(size); ^B"LT>.[
} (Mc{nFqS
} !t%1G.
P|NGAd
private int size=0; 5BrN uR$
ju2H0AQ
private int[] queue; ZayJllaq^
|Iy;_8c
public int get() { h;=~%2Y
return queue[1]; F:zmO5L5
} ?e%*q^~Cu
)U/Kz1U
public void remove() { L7ae6#5.
SortUtil.swap(queue,1,size--); >s<Bu'r
fixDown(1); N8]DzE0%
} [I;C6p
file://fixdown U|wST&rU|
private void fixDown(int k) { 2j f!o
int j; ;CO qu#(
while ((j = k << 1) <= size) { {OG1' m6=/
if (j < size %26amp;%26amp; queue[j] j++; gs<~)&x
if (queue[k]>queue[j]) file://不用交换 nJ2B*(S'v.
break; 4KH'S'eR
SortUtil.swap(queue,j,k); (-<hx~
k = j; '`8 ^P
} o0Teect=
} O%%Q./oh
private void fixUp(int k) { $uLTYu
while (k > 1) { @5d^ C
int j = k >> 1; 6{I7=.V
if (queue[j]>queue[k]) &D<6Go/)_*
break; hy/g*>
SortUtil.swap(queue,j,k); 6+=_p$crMx
k = j; !\b-Ot(
} j32*9
} nscnG5'{+
5,xPB5pK
} ( yLu=
dr)*.<_+a(
} <ppdy,j:
4{>r_^8
SortUtil： A}"|_&E
we}xGb.u
package org.rut.util.algorithm; v:lkvMq|=
",apO
import org.rut.util.algorithm.support.BubbleSort; A":=-$)
import org.rut.util.algorithm.support.HeapSort; +<$(ez
import org.rut.util.algorithm.support.ImprovedMergeSort; X$xf@|<a
import org.rut.util.algorithm.support.ImprovedQuickSort; G!%m~+",
import org.rut.util.algorithm.support.InsertSort; "9s}1C;Me
import org.rut.util.algorithm.support.MergeSort; ,wf_o%'eW
import org.rut.util.algorithm.support.QuickSort; x,: k/]
import org.rut.util.algorithm.support.SelectionSort; IFW(nB(
import org.rut.util.algorithm.support.ShellSort; k8G4CFg}wP
f (C:J[;Z
/** P%B|HnG^
* @author treeroot mN-O{k0\
* @since 2006-2-2 +:Xg7H*
* @version 1.0 e"1mdw"
*/ ^/%o I;O{
public class SortUtil { wsdZwik
public final static int INSERT = 1; sudh=_+>
public final static int BUBBLE = 2; &$ }6:
public final static int SELECTION = 3; MoxWnJy}
public final static int SHELL = 4; |>P:R4P
public final static int QUICK = 5; [`|t(E'
public final static int IMPROVED_QUICK = 6; /#5rt&q
public final static int MERGE = 7; 75>%!mhM
public final static int IMPROVED_MERGE = 8; kM-8%a2i
public final static int HEAP = 9; vEjf|-Mb9
)4o8SF7lz
public static void sort(int[] data) { |`yU \
sort(data, IMPROVED_QUICK); DK2Wjr;
} .|"E:qTD
private static String[] name={ ,&Zp^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =ZSYg K
}; .NWsr*Tel
A46dtFD{
private static Sort[] impl=new Sort[]{ CUB;0J(
new InsertSort(), 5>dA7j^v
new BubbleSort(), PL"=>
new SelectionSort(), bv41et+Kb
new ShellSort(), 9~^k3!>0
new QuickSort(), _R0O9sPTO
new ImprovedQuickSort(), nls$ wE
new MergeSort(), *QNX?8Fm_
new ImprovedMergeSort(), l`75BR
new HeapSort() `C7pM
}; wBlE!Pm
t.&JPTK-H
public static String toString(int algorithm){ <=!t!_
return name[algorithm-1]; {%6 '|<`[
} Ag3+z+uS
LD{~6RP
public static void sort(int[] data, int algorithm) { `4ga~Ch
impl[algorithm-1].sort(data); [6\O <-?
} |0^IX
`?^<r%*F.
public static interface Sort { zgS)j9q}
public void sort(int[] data); ys)
} N)jNvzm
'xEomo#
public static void swap(int[] data, int i, int j) { (7_ezWSl>
int temp = data; |-v/
data = data[j]; w@mCQ$
data[j] = temp; rD6NUS
} ]=3hH+1 a
} C(sz/x?11