[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; V2I"m
} .#,!&Lt
int i1=l; G' ~Z'
int i2=mid+1; ?_L)|:WL
for(int cur=l;cur<=r;cur++){ 5UQz6DK
if(i1==mid+1) [`~E)B1Y
data[cur]=temp[i2++]; }T?0/N3y&
else if(i2>r) V^P]QQ\ )
data[cur]=temp[i1++]; VV*Z5U@b
else if(temp[i1] data[cur]=temp[i1++]; TRl,L5wd-?
else e `!PQMLU
data[cur]=temp[i2++]; X4:\Shb97
} 1jJ>(S
} nl)!)t=n
p`)GO.pz
} :K ^T@F5n
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改进后的归并排序: s0 ZF+6f
H+`s#'(i_P
package org.rut.util.algorithm.support; 3TRzDE(J
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import org.rut.util.algorithm.SortUtil; >xU$)uE&
)x/Spb
/** UJXRL
* @author treeroot UN <s1
* @since 2006-2-2 =rA"|=
* @version 1.0 G6C#M-S
*/ @O/Jy2>3H
public class ImprovedMergeSort implements SortUtil.Sort { 5U&b")3IT!
oh k.;
private static final int THRESHOLD = 10; i(^&ZmG
kCXQHX
/* I+,~pmn:
* (non-Javadoc) v`"z
* S`oADy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O\h*?, )
*/ /Q4TQ\:
public void sort(int[] data) { p&SxR}h
int[] temp=new int[data.length]; j~(s3pSCo
mergeSort(data,temp,0,data.length-1); _;G. QwHr
} DD3.el}6a
B>&Q]J+R
private void mergeSort(int[] data, int[] temp, int l, int r) { uT'}_2=:
int i, j, k; :Yi1#
int mid = (l + r) / 2; @5!Mr5;
if (l == r) Z*EK56.b
return; VQ5D?^'0/
if ((mid - l) >= THRESHOLD) >+iJ(jqq
mergeSort(data, temp, l, mid); 'u6T^YS
else mXd,{b'
insertSort(data, l, mid - l + 1); _d#1muZ?p|
if ((r - mid) > THRESHOLD) WgxGx`Y)
mergeSort(data, temp, mid + 1, r); '?Mt*%J@=$
else poZ04Uxo>
insertSort(data, mid + 1, r - mid); zW^_w&fd^j
^gb3DNV~y
for (i = l; i <= mid; i++) { G_GV
temp = data; [?3]+xr:
} uD=i-IHT
for (j = 1; j <= r - mid; j++) { (yjx+K_[
temp[r - j + 1] = data[j + mid]; &b[.bf
} xV&c)l>}
int a = temp[l]; \K$9r=!(
int b = temp[r]; sN`2"t/s
for (i = l, j = r, k = l; k <= r; k++) { g.wp }fz
if (a < b) { |JZ3aS
data[k] = temp[i++]; v~f_~v5J!
a = temp; aDrF"j
} else { s}8(__|
data[k] = temp[j--]; /5qeNjI+2
b = temp[j]; !~+"TI}_%w
} `SdvXn
} Aofk<O!M
} BI\ )vr$
@>Y.s6a
/** : +Na8\d
* @param data DQC=f8
* @param l +Bg$]~T
* @param i Lnin;0~{
*/ T r|B:)X
private void insertSort(int[] data, int start, int len) { ?b?6/_W~R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ({XB,Rm
} h<)YZ[;x
} nQe^Bn
} o~Jce$X
} ETt7?,x@
bXSsN\:Y@[
堆排序： x*]&Ca0+
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package org.rut.util.algorithm.support; V}?*kx~T2C
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import org.rut.util.algorithm.SortUtil; ^|u7+b'|t
8|Wu8z--
/** HPz9Er
* @author treeroot 7R4sd
* @since 2006-2-2 :{:R5d(_I
* @version 1.0 %sd1`1In
*/ N_3$B=
public class HeapSort implements SortUtil.Sort{ ZDMv8BP7
=ttvC"4?
/* (non-Javadoc) G~z=,72
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K90wX1&
*/ PxuE(n V[
public void sort(int[] data) { :%_*C09
MaxHeap h=new MaxHeap(); (u/-ud1p
h.init(data); <ttrd%VW
for(int i=0;i h.remove(); 'CF?pxNQ l
System.arraycopy(h.queue,1,data,0,data.length); $<;!F=%8
} (T290a9y>
MK"p~b0->
private static class MaxHeap{ R,+Pcn$ws
Ue:LKK1Gsr
void init(int[] data){ vBFMne1h
this.queue=new int[data.length+1]; y {&"g
for(int i=0;i queue[++size]=data; M)m(
fixUp(size); ;iol 2
} 29a~B<e7s
} &@g~o0
d-GU164
private int size=0; ,iUWLcOM
;rp("<g:>
private int[] queue; Z2Q'9C},m
){-Tt`0(u
public int get() { q mJ#cmN
return queue[1]; c@eQSy
} j ^Tb=
8IeE7
public void remove() { \`ya08DP(
SortUtil.swap(queue,1,size--); l(irNKutgo
fixDown(1); o|Q:am'H
} T^z
file://fixdown B^7B-RBi0
private void fixDown(int k) { I_?+;<n
int j; 1/JtL>SKE
while ((j = k << 1) <= size) { 9i6z p'
if (j < size %26amp;%26amp; queue[j] j++; $-J0ou8~
if (queue[k]>queue[j]) file://不用交换 bcM65pt_C
break; ,.<[iHC}9
SortUtil.swap(queue,j,k); B=?m_4\$m
k = j; L=7Y~aL=
} /$EX-!ie
} Z.^DJ9E<1
private void fixUp(int k) { ";kwh8wB
while (k > 1) { [9<c;&$LU
int j = k >> 1; JWh5gOXd
if (queue[j]>queue[k]) +#;t.&\80N
break; Z=[qaJ{]
SortUtil.swap(queue,j,k); r$8(Q'
k = j; k},@2#W]
} =c(t;u6m-
} D+nKQ4
M]5)u=}S-
} ;hf{B7
K2Z]MpLD
} \!51I./Q/
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SortUtil： c"wk_#
rtjUHhF
package org.rut.util.algorithm; 0:1[F!]'b
S17iYjy#8T
import org.rut.util.algorithm.support.BubbleSort; E;o "^[we
import org.rut.util.algorithm.support.HeapSort; K/flg|uZ/V
import org.rut.util.algorithm.support.ImprovedMergeSort; hL?"!
import org.rut.util.algorithm.support.ImprovedQuickSort; q PveG1+25
import org.rut.util.algorithm.support.InsertSort; Qhc>,v)
import org.rut.util.algorithm.support.MergeSort; Ii.0Bul
import org.rut.util.algorithm.support.QuickSort; OMY^'g%w
import org.rut.util.algorithm.support.SelectionSort; &UFj U%Z%
import org.rut.util.algorithm.support.ShellSort; =q\Ghqj1
r(ZMZ^
/** cv=H6j]h|
* @author treeroot IYG,nt!
* @since 2006-2-2 o8RVmOXe
* @version 1.0 L*(!P4S%}
*/ ["u:_2!4P
public class SortUtil { 0Tv0:c>8;(
public final static int INSERT = 1; ZZ? KD\S5
public final static int BUBBLE = 2; "<N2TDF5
public final static int SELECTION = 3; LykB2]T
public final static int SHELL = 4; l-gNJ=l+K
public final static int QUICK = 5; O0Pb"ou_h.
public final static int IMPROVED_QUICK = 6; 2ophh/]
public final static int MERGE = 7; {W' 9k
public final static int IMPROVED_MERGE = 8; P\rA>ZY
public final static int HEAP = 9; ev4f9Fhu
W2w A66MB
public static void sort(int[] data) { IaHu$` v
sort(data, IMPROVED_QUICK); ` it<\r[=
} >zS<1
private static String[] name={ )azK&f@tR|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W<c95QD.
}; C"*8bVx]$n
?*/1J~<(@
private static Sort[] impl=new Sort[]{ 9F"^MzZ
new InsertSort(), ,]LsX"u
new BubbleSort(), &y+)xe:&S
new SelectionSort(), r.ib"W#4
new ShellSort(), U)JwoO
new QuickSort(), J=?P`\h
new ImprovedQuickSort(), xt zjFfq
new MergeSort(), @Rw]boC
new ImprovedMergeSort(), n8.Tag(#
new HeapSort() ]kir@NMv>
}; TN=!;SvQU
Zsto8wuf#
public static String toString(int algorithm){ DedY(JOvB
return name[algorithm-1]; 3EA+tG4KnO
} 9=}&evGm89
/=@V5)
public static void sort(int[] data, int algorithm) { U3^3nL-M9
impl[algorithm-1].sort(data); &Cm$%3
} %jh gKq
G6XDPr:}
public static interface Sort { \Gm\sy
public void sort(int[] data); laQ{nSVBm
} C~X"ZW:d[
nJ|M
public static void swap(int[] data, int i, int j) { d "%6S*dL
int temp = data; ]j+J^g
data = data[j]; ,382O$C
data[j] = temp; 9YvK<i&I
} <i ";5+
} pmuT7*<19