[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; fh*7VuAc
} Cp?6vu|RA
int i1=l; "#:h#uRUb
int i2=mid+1; ~tLvD[n[
for(int cur=l;cur<=r;cur++){ C1#f/o->
if(i1==mid+1) ki'<qa
data[cur]=temp[i2++]; aECpe'!m4
else if(i2>r) $0cE iq?Hf
data[cur]=temp[i1++]; e= XC$Jv
else if(temp[i1] data[cur]=temp[i1++]; |hS^eK_
else _1jbNQa
data[cur]=temp[i2++]; aI>F8R?
} %+((F+[
} 2K^xN]]rG
1@N4Y9o
} BXNC(^
bw)E;1zo
改进后的归并排序: =)#<u9 qqL
Z6zLL
package org.rut.util.algorithm.support; e#vGrLs.
eNK6=D|
import org.rut.util.algorithm.SortUtil; y(*5qa<>
{`Z=LLL
/** HqI[]T@
* @author treeroot Y=i_2R2e2
* @since 2006-2-2 KGf@d*ZOMz
* @version 1.0 k$.l^H u
*/ {z9,CwJan?
public class ImprovedMergeSort implements SortUtil.Sort { qYPgn_
-UWyBM3c@
private static final int THRESHOLD = 10; 7:zoF],s
&p+2Vz{
/* *'BI=*`
* (non-Javadoc) pJ x H
* q&&uX-ez5W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T4J WZ
*/ N3V4Mpf
public void sort(int[] data) { ]M 2n%9
int[] temp=new int[data.length]; #<@_mbQ@|K
mergeSort(data,temp,0,data.length-1); UhXVeGO
} <'jygZ(
gk}.LE
private void mergeSort(int[] data, int[] temp, int l, int r) { LWxP}? =
int i, j, k; S#0C^
int mid = (l + r) / 2; cpH*!*S
if (l == r) S^N{=*
return; /GO((v+J
if ((mid - l) >= THRESHOLD) *c(J4
mergeSort(data, temp, l, mid); s]HJcgI
else Gx|/ Jq
insertSort(data, l, mid - l + 1); #4AqWyp#f
if ((r - mid) > THRESHOLD) ivSpi?
mergeSort(data, temp, mid + 1, r); ?btX&:j2P
else ti<;>P[4
insertSort(data, mid + 1, r - mid); AHT(Z~C
b%X<'8z9Z
for (i = l; i <= mid; i++) { #bb$Icmtk
temp = data; rW)}$|-Z
} PKev)M;C+
for (j = 1; j <= r - mid; j++) { k#2b3}(,
temp[r - j + 1] = data[j + mid]; `uc`vkVZ
} eH9-GGr
int a = temp[l]; QZ5%nJme_
int b = temp[r]; FC4hvO(/m
for (i = l, j = r, k = l; k <= r; k++) { qvs[Gkaa@
if (a < b) { >`n)-8
data[k] = temp[i++]; 9?|m ^
a = temp; .4!wp&
} else { ^fU,9
data[k] = temp[j--]; }]pOR&o
b = temp[j]; 0Rn`63#
} t&C0V|s79$
} m xy=3cUi
} r3YfY\
QaOFl`i
/** kqCUr|M.P
* @param data m.U&O=]5
* @param l V^\b"1X7N
* @param i rD>q/,X=\
*/ /b{Ufo3v
private void insertSort(int[] data, int start, int len) { i;67<f}-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =I$:-[(
} j2|UuWU
} Iy2AJ|d.
} I^QB`%v5
} &qV_|f;
++}#pl8e
堆排序： LfsOGC
fM<g++X
package org.rut.util.algorithm.support; 2!a~YT
\qbEC.-K
import org.rut.util.algorithm.SortUtil; "; ?^gA
XE|"n
/** Z-i$KF
* @author treeroot a]x\e{
* @since 2006-2-2 Csm23QLsg)
* @version 1.0 FFc?Av?_
*/ z\<gm$1CB
public class HeapSort implements SortUtil.Sort{ $t>ow~Xi
k= 9a/M u
/* (non-Javadoc) ,oj)`?Vh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =1j`VJU9
*/ jE$]Z(Ab
public void sort(int[] data) { =l$qwcfbo
MaxHeap h=new MaxHeap(); ~ [=2d a
h.init(data); zQx7qx
for(int i=0;i h.remove(); )eWg2w]
System.arraycopy(h.queue,1,data,0,data.length); t2z@"e
} ":^cb =
d\rs/ee
private static class MaxHeap{ Xx=.;FYk
GnW_^$Fs
void init(int[] data){ -KCQ!0\F
this.queue=new int[data.length+1]; V7>{,
for(int i=0;i queue[++size]=data; <V*M%YWs
fixUp(size); ;<v9i#K5
} oFS)3.
} Z9lfd6MU,
mvBUm-X
private int size=0; H{*R(S<I
;gW?Fnry;
private int[] queue; nB ,&m&
JZ0u/x5
public int get() { 9,Ug
return queue[1]; (2%z9W
} 86f/R c
yl~h `b4
public void remove() { .sbV<ulbc
SortUtil.swap(queue,1,size--); M{~KT3c
fixDown(1); a.g:yWL\
} -\fn\n
file://fixdown AlT04H
private void fixDown(int k) { rxAb]~MMp
int j; n5 jzVv
while ((j = k << 1) <= size) { y:8Oc?
if (j < size %26amp;%26amp; queue[j] j++; *mXs(u
if (queue[k]>queue[j]) file://不用交换 mdIa`OZr
break; `@i!'h
SortUtil.swap(queue,j,k); @&]%%o+
k = j; '|K408i
} ~D\ V!
} :S{+|4pH
private void fixUp(int k) { nK|WzUtp
while (k > 1) { ZIM 5$JdCv
int j = k >> 1; ?!kPW^gD
if (queue[j]>queue[k]) eMDraJv@
break; i^DZK&B@u
SortUtil.swap(queue,j,k); {KalVZX2R
k = j; fwi(qx1=}
} u:D,\`;)
} W%cJ#R[o
g"L$}#iTsl
} fRd^@@,[
v/WvT!6V`
} |0/~7l
~!W{C_*N
SortUtil： _8"%nV
AIFI@#3
package org.rut.util.algorithm; 6'qC *r
m%km@G$
import org.rut.util.algorithm.support.BubbleSort; TwXqk>J
import org.rut.util.algorithm.support.HeapSort; )F) (Hg
import org.rut.util.algorithm.support.ImprovedMergeSort; V3$Yr"rZ;
import org.rut.util.algorithm.support.ImprovedQuickSort; IPT\d^|f
import org.rut.util.algorithm.support.InsertSort; .`K<Iug1
import org.rut.util.algorithm.support.MergeSort; |Ptv)D
import org.rut.util.algorithm.support.QuickSort; o Kfm=TbY
import org.rut.util.algorithm.support.SelectionSort; [Dq!t1
import org.rut.util.algorithm.support.ShellSort; Qtpw0t"
DZ Q=Sinry
/** Ljjuf=]
* @author treeroot Th)Z?\8zk
* @since 2006-2-2 /<$\)|r
* @version 1.0 &*N;yW""f
*/ F"Y.'my8
public class SortUtil { [<M~6]
public final static int INSERT = 1; Q)s[ls
public final static int BUBBLE = 2; ^p433
public final static int SELECTION = 3; Q4,!N(>D
public final static int SHELL = 4; !nkjp[p
public final static int QUICK = 5; 3@/\j^U
public final static int IMPROVED_QUICK = 6; h+7THMI
public final static int MERGE = 7; kKqb:
public final static int IMPROVED_MERGE = 8; Vyqj)1Z8>
public final static int HEAP = 9; P6ztP$M(
&{c.JDO
public static void sort(int[] data) { hf~'EdU
sort(data, IMPROVED_QUICK); GF-\WD
} P[E5e+A)
private static String[] name={ 89[5a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ub/9T-#l
}; LJAqk2k
$ RDwy)9
private static Sort[] impl=new Sort[]{ (/r l\I
new InsertSort(), lU[" ZFP
new BubbleSort(), i/%+x-#
new SelectionSort(), RHc-kggk!
new ShellSort(), +(-L
new QuickSort(), ZCAdCKX|
new ImprovedQuickSort(), kgV_*0^
new MergeSort(), eJJD'Z
new ImprovedMergeSort(), x$;I E
new HeapSort() _Fz]QxO
}; 7xIXFuu
+q/ j
public static String toString(int algorithm){ bZ$;`F5})
return name[algorithm-1]; dyz)22{\!`
} %9!,PeRe
R"9^FQ13
public static void sort(int[] data, int algorithm) { {m)$b
impl[algorithm-1].sort(data); 5HZt5="+
} .MzVc42<
tJ NJS
public static interface Sort { #~(VOcRI
public void sort(int[] data); ? %9-5"U[
} AUm"^-@x#>
c05kHB$O
public static void swap(int[] data, int i, int j) { oK5"RW
int temp = data; ([r4N#lx
data = data[j]; 8tR(i[L
data[j] = temp; <:mV^tK
} %)$^_4.g
} i*Wekr3Wo