[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; 6`$HBX%.K
} zX+NhTTB
int i1=l; ^F@z+q
int i2=mid+1; %j4
for(int cur=l;cur<=r;cur++){ *^cJn*QeL
if(i1==mid+1) EN^C'n
data[cur]=temp[i2++]; cTW3\S=
else if(i2>r) IyvJwrO
data[cur]=temp[i1++]; Lw EI
else if(temp[i1] data[cur]=temp[i1++]; MH;5gC@ `
else A1`y_ Aj
data[cur]=temp[i2++]; eq)8V x0
} %hcn|-"F
} Y_qRW. k
cfn\De%.
} 8 /3`rEW
|q&&"SpA
改进后的归并排序: y8/ 7@qw
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package org.rut.util.algorithm.support; =b+W*vUAw
nSWW^ ;
import org.rut.util.algorithm.SortUtil; N;4tvWI
$GI2rzh
/** yHS=8!
* @author treeroot hq}kAv4B=
* @since 2006-2-2 p-d2HXo
* @version 1.0 Uj5%06
*/ .<Y7,9;YEF
public class ImprovedMergeSort implements SortUtil.Sort { DQ'yFPE
b(<#n6a}\
private static final int THRESHOLD = 10; *Mu X]JK
:q6j{C(
/* [kfLT::mT
* (non-Javadoc) 0 t.'?=
* $]eU'!2)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xO2e>[W
*/ ySyA!Z
public void sort(int[] data) { !`j}%!K!
int[] temp=new int[data.length]; KMFvi_8
mergeSort(data,temp,0,data.length-1); *;(wtMg
} }u"iA^'Ot
4.?tP7UE
private void mergeSort(int[] data, int[] temp, int l, int r) { +&t`"lRl&
int i, j, k; "u#T0
int mid = (l + r) / 2; ][Ne;F6
if (l == r) {rp5qgVE<
return; xiv1y4(%
if ((mid - l) >= THRESHOLD) D]NfA2B7
mergeSort(data, temp, l, mid); 9 U6cM-p?
else ``l7|b jJ
insertSort(data, l, mid - l + 1); )_$F/ug
if ((r - mid) > THRESHOLD) u 3&9R)J1
mergeSort(data, temp, mid + 1, r); zq(R!a6
else 9NX/OctFa'
insertSort(data, mid + 1, r - mid); nYfZ[Q>v
)~((6?k4e
for (i = l; i <= mid; i++) { (`z`ni
temp = data; R?,Oh*
} 7 (}gs?&w
for (j = 1; j <= r - mid; j++) { "RZVv~BD
temp[r - j + 1] = data[j + mid]; Xbm\"g \
} Ne6]?\Z
int a = temp[l]; n\l$R!zr
int b = temp[r]; 5iz(R:P<
for (i = l, j = r, k = l; k <= r; k++) { U _QCe+
if (a < b) { r-Nv<oH;
data[k] = temp[i++]; JqX+vRY;dd
a = temp; "oZ$/ap\
} else { /wF*@/PTH
data[k] = temp[j--]; )U>JFgpIW
b = temp[j]; Ucj eB
} l]pHj4`uv
} _z`g@[m:t
} JIw=Bs
,U-aZ
/** ;cye 'E
* @param data v61'fQ1Qg!
* @param l ,!m][
* @param i K'Gv+UC*6
*/ !N, Oe<
private void insertSort(int[] data, int start, int len) { hB]\vA7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); znNJ?
} *G]zN"Y
} I2U/\
} 4[\[Ho
} WfnBWSA2T
5*Wo/%#q
堆排序： U{^~X_?
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package org.rut.util.algorithm.support; 4 w$f-
y":Y$v,P
import org.rut.util.algorithm.SortUtil; x<mHTh:-V
y@\R$`0J
/** 8&gr}r- 5
* @author treeroot #n9:8BKf
* @since 2006-2-2 .BaU}-5
* @version 1.0 "`QI2{!l
*/ 9_~[
public class HeapSort implements SortUtil.Sort{ Xup"gYTZQ
Zx%ib8|j
/* (non-Javadoc) { S]"-x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tH7@oV;
*/ 7Nw} }
public void sort(int[] data) { v>e%5[F
MaxHeap h=new MaxHeap(); }ZP;kM$g
h.init(data); A7|CG[wZ
for(int i=0;i h.remove(); FCk4[qOp7
System.arraycopy(h.queue,1,data,0,data.length); |U~m8e&:
} 8$c_M
nUgZ]ag=G
private static class MaxHeap{ 9>@@W#TK~
N+l 0XjZD9
void init(int[] data){ # p?7{"Ep
this.queue=new int[data.length+1]; qUZm6)p6[a
for(int i=0;i queue[++size]=data; v,=[!=8!
fixUp(size); Sr9)i8x{
} (JgW")M`cY
} |zJxR_)
\wyn
private int size=0; 1;e"3x"
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private int[] queue; @xO?SjH
G`a,(<kT;
public int get() { 9;fyC=
return queue[1]; m!Iax]D{
} {~Q9jg(A
RB\0o,mw4
public void remove() { ~^6[SbVb
SortUtil.swap(queue,1,size--); }qqE2;{ND
fixDown(1); Awip qDAu
} nBVR)|+M
file://fixdown l'~~hQ{h/
private void fixDown(int k) { zK*zT$<l
int j; `|t X[':
while ((j = k << 1) <= size) { a!_vd B
if (j < size %26amp;%26amp; queue[j] j++; b1("(,r/`
if (queue[k]>queue[j]) file://不用交换 <c,/+ lQ^
break; d]kP@flOV
SortUtil.swap(queue,j,k); -G!W6$Y
k = j; @[:JQ'R=
} u{H'evv0O
} =p1aF/1$I
private void fixUp(int k) { zF%'~S0{
while (k > 1) { Ql%0%naq1
int j = k >> 1; h{$mL#J
if (queue[j]>queue[k]) Vy+%sG q"
break; 4 ^=qc99
SortUtil.swap(queue,j,k); |GDf<\
k = j; yq?7!X
} R%(ww
} Hy?+p{{G
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} $. ;j4%%
c`hj^t
} t Q0vX@I<v
%XpYiW#AK
SortUtil： FXAP]iqo
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package org.rut.util.algorithm; GN7\p)
yf KJpy
import org.rut.util.algorithm.support.BubbleSort; <`'^rCWI?
import org.rut.util.algorithm.support.HeapSort; <@Lw '
import org.rut.util.algorithm.support.ImprovedMergeSort; /c`s$h4-
import org.rut.util.algorithm.support.ImprovedQuickSort; ,>DaS(
import org.rut.util.algorithm.support.InsertSort; !uC`7a
import org.rut.util.algorithm.support.MergeSort; v Ft]n
import org.rut.util.algorithm.support.QuickSort; H-*"%SJ
import org.rut.util.algorithm.support.SelectionSort; 5i 6*$#OM_
import org.rut.util.algorithm.support.ShellSort; g_2m["6*
:4{;^|RgU
/** liYR8D |
* @author treeroot ,P?R 3
* @since 2006-2-2 cY}Nr#%s@U
* @version 1.0 U?MKZL7
*/ Fu K(SP3
public class SortUtil { .szs?
public final static int INSERT = 1; 7_AR()CM
public final static int BUBBLE = 2; 80/6-_g(
public final static int SELECTION = 3; Ji>
public final static int SHELL = 4; WIe2j
public final static int QUICK = 5; /1Xji0LK
public final static int IMPROVED_QUICK = 6; +O@v|}9"w3
public final static int MERGE = 7; UE3#(:xA
public final static int IMPROVED_MERGE = 8; a"!D@a
public final static int HEAP = 9; :&]THUw
~[J&n-bJU
public static void sort(int[] data) { G4jaHpPi
sort(data, IMPROVED_QUICK); [@Db7]nG
} (Ea)`'/
private static String[] name={ bS0z\!1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nly`\0C
}; -?8;-h, h
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private static Sort[] impl=new Sort[]{ k)2L<Lmn
new InsertSort(), SI:+I4i
new BubbleSort(), 67uUeCW
new SelectionSort(), </K"\EU
new ShellSort(), :Sh>
new QuickSort(), oSb,)k@
new ImprovedQuickSort(), Wr\rruH6
new MergeSort(), %"R|tlG
new ImprovedMergeSort(), erG;M!9\
new HeapSort() ^#H%LLt
}; @K 8sNPK
^9})@,(D
public static String toString(int algorithm){ !MOgM
return name[algorithm-1]; rb+&]
} DA[s k7
oGzZ.K3 A
public static void sort(int[] data, int algorithm) { QR!8n
impl[algorithm-1].sort(data); LL~bq(b
} {+V1>6
N'L3Oa\%
public static interface Sort { wv 7jES
public void sort(int[] data); >?b9Xh
} t^h{D
x,Im%!h
public static void swap(int[] data, int i, int j) { <y+8\m
int temp = data; mWUo:(U
data = data[j]; \Rc7$bS2H
data[j] = temp; m6P!#=a:l<
} tHhA_
} u!([m; x|