[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; ^ ^k]2oG
} b2XUZ5
int i1=l; p]x9hZ
int i2=mid+1; 5^C.}/#>F
for(int cur=l;cur<=r;cur++){ Yl"l|2 :
if(i1==mid+1) cc:,,T/i
data[cur]=temp[i2++]; wg=-&-
else if(i2>r) b|nh4g
data[cur]=temp[i1++]; Mcqym8,q|3
else if(temp[i1] data[cur]=temp[i1++]; :NXM.@jJ="
else ,_I#+XiXY
data[cur]=temp[i2++]; 1Ts$kdO
} \kG;T=H
} ?K= X[
W6jdS;3
} ehyCAp0oI
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改进后的归并排序: Kq;s${ |G
lR0WDJv
package org.rut.util.algorithm.support; O_^t u?x
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import org.rut.util.algorithm.SortUtil; ':DLv{R
%)sG 34
/** s'=w/os
* @author treeroot r;8X6C
* @since 2006-2-2 q1,jDJglZ
* @version 1.0 XG01g3
*/ %OAvhutS
public class ImprovedMergeSort implements SortUtil.Sort { >%c7|\q[R
>M^4p
private static final int THRESHOLD = 10; .{4U]a;[
xH>2$ ;f
/* #?fKi$fS;L
* (non-Javadoc) l@`Do[
* i]}`e>fF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1[40\sM
*/ _ cm^Fi5
public void sort(int[] data) { `R,g_{Mj
int[] temp=new int[data.length]; Og<nnq
mergeSort(data,temp,0,data.length-1); !Hx[ `3
} KLCd`vr.xf
% jSB9
private void mergeSort(int[] data, int[] temp, int l, int r) { I:edLg1T
int i, j, k; XY!0yAK(!
int mid = (l + r) / 2; %IK[d#HO
if (l == r) R>R8LIZZc
return; y-lBaTE9
if ((mid - l) >= THRESHOLD) dQJ)0!B
mergeSort(data, temp, l, mid); `!@d$*:'
else D ]G=sYt
insertSort(data, l, mid - l + 1); U$7]*#@&
if ((r - mid) > THRESHOLD) ?V' zG&n@
mergeSort(data, temp, mid + 1, r); cA{7*=G?
else J1"16Uu
insertSort(data, mid + 1, r - mid); 1s6L]&B
XxLauJP K
for (i = l; i <= mid; i++) { Y|~+bKa
temp = data; D"8?4+
} CZw]@2/JuQ
for (j = 1; j <= r - mid; j++) { `XrF ,
temp[r - j + 1] = data[j + mid]; ][1 iKT
} #b94S?dq
int a = temp[l]; n 'E:uXv"
int b = temp[r]; +MyXIWmD
for (i = l, j = r, k = l; k <= r; k++) { #"!q_@b,D
if (a < b) { m*~Iu<5L
data[k] = temp[i++]; ]? %*3I
a = temp; '?uwUBi
} else { q.!<GqSgb
data[k] = temp[j--]; {3eg4j.Z
b = temp[j]; fzZ`O{$8
} D]+]Br8
} {8T/;K@
} Pd04
jKr>Ig=$tA
/** Eal*){"<,?
* @param data \^x`GsVy
* @param l E-Y4TBZ*
* @param i 1h#e-Oyff
*/ L)X[$:
private void insertSort(int[] data, int start, int len) { 7~!F3WT{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nd,2EX<bE
} <5o oML]nP
} F}c}I8Ao
} /q5!p0fH*
} ;}}k*< Z
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堆排序： 74fE%;F
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package org.rut.util.algorithm.support; %gEgpJd
";;Nc>-Y
import org.rut.util.algorithm.SortUtil; v@QfxV2
HcCT=x7:
/** Ot;)zft
* @author treeroot /@Ec[4^=!.
* @since 2006-2-2 +d=w%r)
* @version 1.0 [Zne19/
*/ =XFyEt
public class HeapSort implements SortUtil.Sort{ z -uW,
5+[ 3@
/* (non-Javadoc) `Ha<t.v(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c]68$;Z7
*/ <lTLz$QE
public void sort(int[] data) { "Pa y2
MaxHeap h=new MaxHeap(); b=XXp`h~a
h.init(data); qaG8:
for(int i=0;i h.remove(); dy3fZ(=q^
System.arraycopy(h.queue,1,data,0,data.length); =[LUOOR*]
} om2)Cd9~7
tL]T_]z
private static class MaxHeap{ P(aN6)D
>E9 k5
void init(int[] data){ @ RP?)*8}&
this.queue=new int[data.length+1]; @:t2mz:^i
for(int i=0;i queue[++size]=data; L~E|c/
fixUp(size); X+QoO=02LR
} %+@<T<>J<k
} EIF"{,m
6cXZ3;a
private int size=0; "f:_(np,
Ou{VDE
private int[] queue; zg$NrI&
/"@cv{
public int get() { =F09@C,
return queue[1]; 2]cU:j6G
} J+m1d\lBu
b}!T!IP}
public void remove() { PO*0jO;%
SortUtil.swap(queue,1,size--); " TC:O^X
fixDown(1); 88Vl1d&b
} /YHnt-}v,
file://fixdown s[#_sR`y
private void fixDown(int k) { v9"03=h
int j; !q 9PO
while ((j = k << 1) <= size) { SW7AG;c=
if (j < size %26amp;%26amp; queue[j] j++; UBw*}p
if (queue[k]>queue[j]) file://不用交换 ny1Dg$ui2
break; ]h'*L`
SortUtil.swap(queue,j,k); @3`Pq2<
k = j; %xdyGAl:
} WHcw5_3#
} v;(k7
private void fixUp(int k) { Bhk@0\a
while (k > 1) { bMGXx>x
int j = k >> 1; yH0vESgv
if (queue[j]>queue[k]) S]?I7_
break; gwDVWhq
SortUtil.swap(queue,j,k); jD?*sd
k = j; dH)\zCt
} eC`G0.op
} k,61Va
6*:U1{Gl)
} byPqPSY
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} y>0Gmr
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SortUtil： ]QJ7q}
84/#,X!=s
package org.rut.util.algorithm; l:*.0Tj
-'T^gEd)c
import org.rut.util.algorithm.support.BubbleSort; h059DiH
import org.rut.util.algorithm.support.HeapSort; >dnDN3x
import org.rut.util.algorithm.support.ImprovedMergeSort; EZ[e a<
import org.rut.util.algorithm.support.ImprovedQuickSort; P98g2ak
import org.rut.util.algorithm.support.InsertSort; \f'=
import org.rut.util.algorithm.support.MergeSort; kV4,45r
import org.rut.util.algorithm.support.QuickSort; "] ]aF1
import org.rut.util.algorithm.support.SelectionSort; ~0rvrDDg
import org.rut.util.algorithm.support.ShellSort; 0(Hzh?t_
NXOcsdcZu
/** ;)z+dd#3
* @author treeroot *2 ~"%"C
* @since 2006-2-2 *fI\|%K
* @version 1.0 n( zzH
*/ t@jke
public class SortUtil { )H+p6<
public final static int INSERT = 1; W4=A.2[q
public final static int BUBBLE = 2; JhvT+"~
public final static int SELECTION = 3; tk+4noA
public final static int SHELL = 4; P>'29$1'
public final static int QUICK = 5; lQpl8>
public final static int IMPROVED_QUICK = 6; vw :&c.zd
public final static int MERGE = 7; !ezy v`
public final static int IMPROVED_MERGE = 8; VyWzb
public final static int HEAP = 9; n$<n Yr`X
6foiN W+
public static void sort(int[] data) { {Gw{W&<
sort(data, IMPROVED_QUICK); t(UdV
} 04:QEC"9mj
private static String[] name={ uG(XbDZZ1W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EPU3Jban
}; [0lO0ik>G
XO}SPf-
private static Sort[] impl=new Sort[]{ !UHX?<3r
new InsertSort(), 3g5D[>J'
new BubbleSort(), A}i>ys
new SelectionSort(), sLf~o"yb
new ShellSort(), qfF2S
new QuickSort(), lqvP Dz
new ImprovedQuickSort(), . dJBv
new MergeSort(), 4jC7>mE
new ImprovedMergeSort(), =z\/xzAwX
new HeapSort() B^C5?
}; vJe c+a
gUme({h&|
public static String toString(int algorithm){ oiQ:&$y
return name[algorithm-1]; 'ql<R0g
} XW:%YTv
BOv^L?)*Z
public static void sort(int[] data, int algorithm) { ie7P^:T|+
impl[algorithm-1].sort(data); fYlqaO4[
} dg&GMo
S2EV[K8#
public static interface Sort { o0TB>DX$`
public void sort(int[] data); 0@RVM|
} =b>e4I@
x M{SFF
public static void swap(int[] data, int i, int j) { 7{38g
int temp = data; iyr<qtwK
data = data[j]; U "v=XK)!
data[j] = temp; M|7][!<G!
} U5[r&Y D
} py6O\` \