[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; N*f^Z#B]
} Rxx>{+f4M
int i1=l; 9[kX/#~W*
int i2=mid+1; uMHRUi
for(int cur=l;cur<=r;cur++){ j$+gq*I&E
if(i1==mid+1) ovz#
data[cur]=temp[i2++]; +I&J7ICV0
else if(i2>r) r]0(qg
data[cur]=temp[i1++]; `0?^[;[u[
else if(temp[i1] data[cur]=temp[i1++]; '|&,E#`
else Bq *[c=(2
data[cur]=temp[i2++]; Q? qjWZY
} ~Yl<S(/4
} P])L8zK
s{ =5-:
} +lKrj\Xj
+5-]iKh
改进后的归并排序: {EL'd!v7e
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package org.rut.util.algorithm.support; uWTN2jr
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import org.rut.util.algorithm.SortUtil; <PioQ>~
z>|)ieL
/** "c,!vc4
* @author treeroot tn{8u7
* @since 2006-2-2 ".E5t@ }?m
* @version 1.0 Jh?z=JY
*/ n26>>N
public class ImprovedMergeSort implements SortUtil.Sort { ;b1wk^,Hw~
gH'_ymT= 3
private static final int THRESHOLD = 10; /1[gn8V691
0V3gKd7
/* EI\v
* (non-Javadoc) g#qNHR
* P_}/#N{C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7b46t2W<
*/ y:,9I`aW
public void sort(int[] data) { ESIzGaM
int[] temp=new int[data.length]; UWw}!1
mergeSort(data,temp,0,data.length-1); lbS?/f
} e/>:K' {
YDFCGA
private void mergeSort(int[] data, int[] temp, int l, int r) { XVF^,Yf
int i, j, k; q & b5g !
int mid = (l + r) / 2; TP{Gt.e
if (l == r) T(V8;!
return; s^cc@C
if ((mid - l) >= THRESHOLD) b_=8!Q.:
mergeSort(data, temp, l, mid); 2e.N"eLNt
else IA2GUnUhu
insertSort(data, l, mid - l + 1); b=1%pX_
if ((r - mid) > THRESHOLD) z,x"a
mergeSort(data, temp, mid + 1, r); +]c}rWm
else bDWeU}
insertSort(data, mid + 1, r - mid); f05=Mc&)
x'qWM/
for (i = l; i <= mid; i++) { -`Q}tg>cT
temp = data; g4wZvra6%)
} VgMP^&/gZ
for (j = 1; j <= r - mid; j++) { |1l&@#j!2
temp[r - j + 1] = data[j + mid]; %`+'v_iu
} ej52AK7
int a = temp[l]; jo_ sAb
int b = temp[r]; E:w:4[neh
for (i = l, j = r, k = l; k <= r; k++) { N_G4_12(
if (a < b) { e:OyjG5_
data[k] = temp[i++]; 6/6Rah!
a = temp; *b"CPg/\
} else { FJT1i@N
data[k] = temp[j--]; _]=9#Fg7{
b = temp[j]; CZ3].DA|z
} 9!}q{2j
} G52Z)^
} ErDL^M-`
d0 -~|`5
/** HH8;J66I&
* @param data etyCrQ ?U
* @param l c@(1:,R
* @param i hH`Jb77L
*/ M4?8xuC
private void insertSort(int[] data, int start, int len) { gvyT-XI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >'`Sf ?+|
} j[XYj6*d
} %8w9E=
} 2+'|kt2
} ,J(lJ,c
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堆排序： RtC'v";6
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package org.rut.util.algorithm.support; Y)M8zi>b
}Hy ~i
import org.rut.util.algorithm.SortUtil; {Q~7M$
VT=K"`EpQ
/** <9ifPSvJ
* @author treeroot &?+WXL>
* @since 2006-2-2 0@pu@DP~
* @version 1.0 n"G`b
*/ %0XvJF)s
public class HeapSort implements SortUtil.Sort{ I:$"E% >=
IU!Ht>
/* (non-Javadoc) 4:1)~z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]V<-J
*/ ssl&5AS
public void sort(int[] data) { n &}s-`D
MaxHeap h=new MaxHeap(); V1<`%=%_W
h.init(data); X:=c5*0e
for(int i=0;i h.remove(); mhzYz;}
System.arraycopy(h.queue,1,data,0,data.length); 5~r2sCDPk
} p=gX!4,9<
P`"mM?u
private static class MaxHeap{ (V?@?25
R1%y]]*-P
void init(int[] data){ *YvRNHP
this.queue=new int[data.length+1]; 1`-r#-MGG
for(int i=0;i queue[++size]=data; 3~%!m<1:
fixUp(size); K+),?Q ?.p
} p2d\ZgWD=)
} 4%_M27bu[
`w<J25
private int size=0; sN/+
`# ^0cW
private int[] queue; 0=![fjm
~<ri97)
public int get() { Gr)-5qh
return queue[1]; 3f&|h^\nD
} Vb)zZ^va+
<B[G |FY,
public void remove() { qO()w
SortUtil.swap(queue,1,size--); ~&g a1r2v?
fixDown(1); 5 9-!6;T
} g>0vm2|
file://fixdown 5Op_*N{V
private void fixDown(int k) { V#^yX%
int j; w*~Tm>U
while ((j = k << 1) <= size) { h?j_Ry
if (j < size %26amp;%26amp; queue[j] j++; rFu ez$
if (queue[k]>queue[j]) file://不用交换 xPC"c*
break; MCnN^
SortUtil.swap(queue,j,k); n1J]p#nCa.
k = j; h-XY4gq/
} KoHGweKl#
} D}{b;Un
private void fixUp(int k) { )=_ycf^MC
while (k > 1) { RKuqx:U
int j = k >> 1; ;j'Daupt;=
if (queue[j]>queue[k]) ijW7c+yd
break; g9>~HF$U
SortUtil.swap(queue,j,k); <P4FzK
k = j; OJ3UE(,I=
} @d&H]5
} o8S"&O ?
m 7LUrU
} 2wlKBSON
I1=(. *B}
} npH?4S-8G
reiU%C
SortUtil： |jG~,{
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package org.rut.util.algorithm; wk$,k
p3]Q^KFS
import org.rut.util.algorithm.support.BubbleSort; ?IW_O~Js
import org.rut.util.algorithm.support.HeapSort; 82:Wvp6
import org.rut.util.algorithm.support.ImprovedMergeSort; h @/;`E[
import org.rut.util.algorithm.support.ImprovedQuickSort; g8pO Lr'
import org.rut.util.algorithm.support.InsertSort; Vfs$VY2.
import org.rut.util.algorithm.support.MergeSort; <bUe/m
import org.rut.util.algorithm.support.QuickSort; b"CAKl
import org.rut.util.algorithm.support.SelectionSort; NiSO'=y$n
import org.rut.util.algorithm.support.ShellSort; ?M}S|dsmE
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/** :td ~g;w
* @author treeroot SW 8x]B
* @since 2006-2-2 {1Eu7l-4
* @version 1.0 w1^QD^KnH
*/ [r-}bp'Gp
public class SortUtil { ?6N3tk-2
public final static int INSERT = 1; {aOkV::
public final static int BUBBLE = 2; =1hr2R(V
public final static int SELECTION = 3; q mQfLz7&x
public final static int SHELL = 4; wEEn?
public final static int QUICK = 5; WFv!Pbq,
public final static int IMPROVED_QUICK = 6; ,.mBJSE3
public final static int MERGE = 7; }iiHr|l3
public final static int IMPROVED_MERGE = 8; nzsl@1s
public final static int HEAP = 9; %J7UP4
.#w6%c@
public static void sort(int[] data) { lK(Fg
sort(data, IMPROVED_QUICK); e XV@.
} \k@$~}xD,
private static String[] name={ {=Q7m`1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zq"7,z7
}; tw K^I6@
ZFn(x*L
private static Sort[] impl=new Sort[]{ l|"6yB |
new InsertSort(), e@]-D FG
new BubbleSort(), ~}ovuf=%
new SelectionSort(), Jfhk@27T
new ShellSort(), ~^US/"
new QuickSort(), +]wuJSxc
new ImprovedQuickSort(), w=_Jc8/.
new MergeSort(), "VUYh$=[
new ImprovedMergeSort(), ! fl4"
new HeapSort() IApT'QNM
}; X(AN)&L[
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public static String toString(int algorithm){ `wz[='yM
return name[algorithm-1]; E5GJi
} 5er@)p_
qRB7Ec_
public static void sort(int[] data, int algorithm) { 4gBp8*2
impl[algorithm-1].sort(data); ]7YNIS
} 4B[D/kIg
J%rP$O$
public static interface Sort { UE0$ o?
public void sort(int[] data); gX @`X
} #2p#VQh
IQ!Fv/I<
public static void swap(int[] data, int i, int j) { Ud%s^A-qS
int temp = data; ]ya; v '
data = data[j]; ,[rPe\w.z
data[j] = temp; ^4Uw8-/9
} '?5j[:QY@
} 4vZ4/#(x