[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; r>B|JPm
} :?SD#Vvrh.
int i1=l; !TLJk]7uC
int i2=mid+1; )F,z pGG
for(int cur=l;cur<=r;cur++){ cr~.],$Om
if(i1==mid+1) U[W &D%'
data[cur]=temp[i2++]; dK>sHUu
else if(i2>r) LyRW\\z2
data[cur]=temp[i1++]; O9_SVXWVw
else if(temp[i1] data[cur]=temp[i1++]; 1\-r5e; BE
else x%T.0@!8
data[cur]=temp[i2++]; 8~ u/gM
} f-Zi!AGh>
} h}4yz96WD
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} 2ae"Sd!-2
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改进后的归并排序: }mpFo2
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package org.rut.util.algorithm.support; in`|.#
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import org.rut.util.algorithm.SortUtil; zJo?,c
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/** H:cAORLB
* @author treeroot %a']TX
* @since 2006-2-2 yf/i)
* @version 1.0 P~s u]+
*/ _fS4a134R
public class ImprovedMergeSort implements SortUtil.Sort { b*1yvkX5
q1Mt5O}
private static final int THRESHOLD = 10; *auT_*
(#8B
/* z0@BBXQ`
* (non-Javadoc) :Q8*MJ3&V
* V&7NN=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q hdG(`PY~
*/ izs=5
public void sort(int[] data) { ojc.ykP$
int[] temp=new int[data.length]; YP>J'{?b*"
mergeSort(data,temp,0,data.length-1); DMlr%)@{
} Vllxv6/_
[ps4i_
private void mergeSort(int[] data, int[] temp, int l, int r) { 1)!2D?w
int i, j, k; ik1asj1
int mid = (l + r) / 2; k~)@D| ?
if (l == r) jXPbj.
return; L8(2or
if ((mid - l) >= THRESHOLD) TG%w
mergeSort(data, temp, l, mid); 9 !$&1|,*
else ~BMUea(
insertSort(data, l, mid - l + 1); 8.Ufw. 5
if ((r - mid) > THRESHOLD) MV]`[^xQ5
mergeSort(data, temp, mid + 1, r); C-XJe~
else 6q^\pJY%&7
insertSort(data, mid + 1, r - mid); hbEqb{#}@
Z<,Hz+
for (i = l; i <= mid; i++) { aW9\h_$
temp = data; X8):R- J
} kPoz&e_@
for (j = 1; j <= r - mid; j++) { I51I(QF=
temp[r - j + 1] = data[j + mid]; ~F%sO'4!
} q1v7(`O
int a = temp[l]; 29cx(
int b = temp[r]; Gn<0Fy2
for (i = l, j = r, k = l; k <= r; k++) { 5p6/dlN-a
if (a < b) { -fp/3-
data[k] = temp[i++]; 7M8cF>o
a = temp; }B_?7+
} else { 70 Ph^e)
data[k] = temp[j--]; r6GXmr
b = temp[j]; 6\k~q.U@XI
} oW^>J-
} 5zh6l+S[
} +s^nT{B@\
a~?B/ g&_
/** 2|ej~}Y
* @param data q"EW*k+ )
* @param l e N v\ZR1
* @param i ix$ ^1(
*/ TO.STK`
private void insertSort(int[] data, int start, int len) { (V1;`sI8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w 62m}5eA
} :{4C2qK>
} \;KSx3o
} [ r
} |P`b"x
}Xfg~%6
堆排序： ~f"3Wa*\B
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package org.rut.util.algorithm.support; {]dG 9
\GQRpJ#h1
import org.rut.util.algorithm.SortUtil; R!yh0y}Z
)_\;l%&
/** W?"l6s
* @author treeroot ?XP4kjJ
* @since 2006-2-2 fDqDU
* @version 1.0 HEAW](s
*/ %8wBZ~1-
public class HeapSort implements SortUtil.Sort{ 0U:X[2|)
JdLPIfI^
/* (non-Javadoc) 9HEqB0|ZRu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mln4Vl(l2M
*/ WrcmC$ff
public void sort(int[] data) { + K`.ck
MaxHeap h=new MaxHeap(); @3$I
h.init(data); JZ+6)R
for(int i=0;i h.remove(); VrLp5?Bh
System.arraycopy(h.queue,1,data,0,data.length); zA}JVB
} _iCrQJ0"T
m5&Ht (I%n
private static class MaxHeap{ X)6G:cD
O2?yI8|Jn
void init(int[] data){ EZ:? (|h
this.queue=new int[data.length+1]; x2a ?ugQ
for(int i=0;i queue[++size]=data; t- TUP>_
fixUp(size); KC"&3
} 0|J9Btbp
} ~@*q8lC
S>r}3,]S
private int size=0; po\jhfn
Nsq=1) <
private int[] queue; Ph%ylS/T{
H C,5j)1
public int get() { "" >Yw/'
return queue[1]; ,A7:zxnc.V
} Pz[UAJ
bcjh3WP
public void remove() { YFPse.2$a
SortUtil.swap(queue,1,size--); pdER#7Tq
fixDown(1); Fx}v.A5
} 8_w6% md
file://fixdown J%|;
private void fixDown(int k) { )/JVp>
int j; 8t=O=l\
while ((j = k << 1) <= size) { H\n6t-l
if (j < size %26amp;%26amp; queue[j] j++; DTuco9yr[
if (queue[k]>queue[j]) file://不用交换 EC0B6!C&7
break; s8[(
SortUtil.swap(queue,j,k); ZMZWO$"K1
k = j; r7>FH!=:
} JP0aNu
} -^yc<%U
private void fixUp(int k) { fZr{x$]N0
while (k > 1) { a%BC{XX
int j = k >> 1; tmoCy0qWz
if (queue[j]>queue[k]) b;d7mh4
break; 5%(whSKZF
SortUtil.swap(queue,j,k); $xdo=4;|
k = j; pfIK9>i
} xzOvc<u
} A'7Y{oPHX
@BjB Mi,
} 9eq)WI/
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} h*D -Vo
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SortUtil： l3u+fE,;_
568M4xzi
package org.rut.util.algorithm; XUh&an$
"~EAt$
import org.rut.util.algorithm.support.BubbleSort; 9S17Lr*c
import org.rut.util.algorithm.support.HeapSort; @ U"Ib
import org.rut.util.algorithm.support.ImprovedMergeSort; :UH*Wft1
import org.rut.util.algorithm.support.ImprovedQuickSort; m<z?6VC
import org.rut.util.algorithm.support.InsertSort; ^GrSvl}v'
import org.rut.util.algorithm.support.MergeSort; K$D+TI)
import org.rut.util.algorithm.support.QuickSort; M,p0wsj;
import org.rut.util.algorithm.support.SelectionSort; #y7MB6-
import org.rut.util.algorithm.support.ShellSort; rA8NE>
RA!m,"RM
/** mt0v (
* @author treeroot i <gt`UCO
* @since 2006-2-2 YU0pWM
* @version 1.0 Iurz?dt4w
*/ BR?DW~7J j
public class SortUtil { v(JjvN21
public final static int INSERT = 1; f%t N2k
public final static int BUBBLE = 2; 9[*P`*&
public final static int SELECTION = 3; 3hBYx@jTO
public final static int SHELL = 4; #DguV
public final static int QUICK = 5; 1I'}Uh*
public final static int IMPROVED_QUICK = 6; GHLnwym
public final static int MERGE = 7; K"g{P
public final static int IMPROVED_MERGE = 8; i !sVQ(:
public final static int HEAP = 9; >7X5/z
4IB`7QJq
public static void sort(int[] data) { 9;vES^
sort(data, IMPROVED_QUICK); P8=J0&5
} y]obO|AH
private static String[] name={ ?P9VdS1-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C"`\[F`.k
}; il{x?#Wrb
/8`9SS
private static Sort[] impl=new Sort[]{ @>~S$nw/
new InsertSort(), UHi^7jQ
new BubbleSort(), hUp3$4w
new SelectionSort(), zK1\InP
new ShellSort(), {~}:oV
new QuickSort(), tRc3<>
new ImprovedQuickSort(), J32{#\By
new MergeSort(), `WC4:8
new ImprovedMergeSort(), yGWl8\,j0
new HeapSort() s5{H15
}; ^mI`P}5Y
v6aMYmenBH
public static String toString(int algorithm){ X=6L-^o)
return name[algorithm-1]; WTt /y\'6
} K^GvU0\
:mCGY9d4L
public static void sort(int[] data, int algorithm) { +|+fDQI
impl[algorithm-1].sort(data); 0L"uU3
} yJqDB$0
:18}$
public static interface Sort { Qd% (]L[N.
public void sort(int[] data); cw~GH
} l,A\]QDvl
e*( _Cvxp
public static void swap(int[] data, int i, int j) { =yqg,w&Q
int temp = data; jamai8
data = data[j]; em^2\*sxpA
data[j] = temp; WRAv>s9
} >[T6/#M
} }c4F}Cy