[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; x6, #Jp
} B=>:w%<Ii
int i1=l; PRs[!EB6
int i2=mid+1; zL1*w@6
for(int cur=l;cur<=r;cur++){ k/"^W.B aj
if(i1==mid+1) 's.cwB: #
data[cur]=temp[i2++]; -QUr|:SK:
else if(i2>r) O4Wn+$AN
data[cur]=temp[i1++]; _TB,2 R
else if(temp[i1] data[cur]=temp[i1++]; WBo|0(#
else `)9nBZ
data[cur]=temp[i2++]; y>:-6)pv
} IfGmA.O
} J 8/]&Ow
`}b#O}z)^
} 2:31J4t-<
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改进后的归并排序: B74L/h
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package org.rut.util.algorithm.support; #].n0[
SR,id B&i
import org.rut.util.algorithm.SortUtil; U_/sY9gz(
a/9R~DwN
/** Ueq*R(9>
* @author treeroot `/zx2Tkk
* @since 2006-2-2 (J c} K
* @version 1.0 HFJna2B`
*/ ;.=ZwM]C
public class ImprovedMergeSort implements SortUtil.Sort { *W'F6Hpu
!xU1[,9
private static final int THRESHOLD = 10; q/ x(:yol
d?j_L`?+
/* s0}OsHAj
* (non-Javadoc) )2@_V %
* NWuJ&+gcO5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CM}1:o<<N
*/ 8hx4s(1!
public void sort(int[] data) { 8PWx>}XPt
int[] temp=new int[data.length]; K~j&Q{yws@
mergeSort(data,temp,0,data.length-1); 7Z-'@m
} (dOC ^i
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private void mergeSort(int[] data, int[] temp, int l, int r) { )!h(oR
int i, j, k; xc%\%8C}
int mid = (l + r) / 2; <kQ 5sG
if (l == r) vvJ{fi
return; XcoV27
if ((mid - l) >= THRESHOLD) m5O;aj* i
mergeSort(data, temp, l, mid); `>M-J-J
else (1~d/u?2\
insertSort(data, l, mid - l + 1); (=v :@\r
if ((r - mid) > THRESHOLD) H4s^&--
mergeSort(data, temp, mid + 1, r); tb^8jC
else gWt}q-@nRR
insertSort(data, mid + 1, r - mid); cC{eu[ XW
&PHejG_#
for (i = l; i <= mid; i++) { "O{_LOJ
temp = data; 8dg\_H_
} p.{M sn
for (j = 1; j <= r - mid; j++) { dP>~ExYtm
temp[r - j + 1] = data[j + mid]; gyqM&5b
} VR86ok
int a = temp[l]; /.Yf&2X\
int b = temp[r]; ^Eu]i
for (i = l, j = r, k = l; k <= r; k++) { #fq%903=
if (a < b) { 6#Ag^A
data[k] = temp[i++]; yc4?'k!
a = temp; R+'$V$g\X
} else { >FO4]
data[k] = temp[j--]; ?C(' z7
b = temp[j]; 2K^D%U
} 3[R<JrO
} ^*CvKCS
} 3AKT>Wy =
pkW }\r
/** @J`o pR
* @param data {M`yYeo
* @param l *&WkorByW
* @param i ~0}gRpMW
*/ m:kXr^!D
private void insertSort(int[] data, int start, int len) { ?hqHTH:PU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 20 <$f
} T:v.]0l~
} ]} D^?g^
} bsfYz
} =NHE_4/p
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堆排序： 6`KR
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package org.rut.util.algorithm.support; yyp0GV.x
j@N z
import org.rut.util.algorithm.SortUtil; -^1}J
/_WAF90R?
/** t>hoXn^-
* @author treeroot C%2BDj
* @since 2006-2-2 vY 0EffZ
* @version 1.0 |PGF g0li
*/ Nk.m$
public class HeapSort implements SortUtil.Sort{ OyI?P_0u
<x QvS^|[
/* (non-Javadoc) KCBA`N8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qPI\Y3ZU
*/ \9HpbCHr
public void sort(int[] data) { cTC -cgp
MaxHeap h=new MaxHeap(); b 7XTOB_HO
h.init(data); _Y{8FN(4
for(int i=0;i h.remove(); A-n@:` n~
System.arraycopy(h.queue,1,data,0,data.length); XmZs4~\K$G
} gxKL yZO!
Yfbo=yk
private static class MaxHeap{ Z\lJE>1
GHs,,J;
void init(int[] data){ -_*ux!
this.queue=new int[data.length+1]; m|') A
for(int i=0;i queue[++size]=data; ]\~s83?X
fixUp(size); :d AC:h
} ZVelKI8>
} DpRGPs
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private int size=0; N8[ &1
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private int[] queue; H=/;
X-,mNvz
public int get() { lU\v8!Ji
return queue[1]; {"dvU"y)\
} q1a*6*YB
R|@?6<
public void remove() { mm dQ\\
SortUtil.swap(queue,1,size--); ym_w09
fixDown(1); 5cUz^ >
} /f*QxNZ,p
file://fixdown MdC}!&W
private void fixDown(int k) { #+"1">l
int j; op2<~v0?
while ((j = k << 1) <= size) { [g/ &%n0^
if (j < size %26amp;%26amp; queue[j] j++; @<TC+M5!
if (queue[k]>queue[j]) file://不用交换 +s j2C
break; kEYkd@{
SortUtil.swap(queue,j,k); ;f!}vo<;
k = j; gLss2i.r
} ^XgBkC~
} .)g7s? K
private void fixUp(int k) { 9Ai3p
while (k > 1) { mgd)wZNV
int j = k >> 1; d)WGI RUx
if (queue[j]>queue[k]) EXbaijHQG
break; NZu2D
SortUtil.swap(queue,j,k); 9 df GV!Z
k = j; vNDf1B5z
} A4tb>OM
} jtv<{7a
^Q#g-"b
} l9Av@|
Mp3nR5@d$
} K^Ho%_)
Ln$= 8x^T
SortUtil： |W\U9n
-NPX;e$<
package org.rut.util.algorithm; rqWD#FB=z
0K(&EpVE
import org.rut.util.algorithm.support.BubbleSort; Tr.u'b(
import org.rut.util.algorithm.support.HeapSort; XS(Q)\"
import org.rut.util.algorithm.support.ImprovedMergeSort; WkMB
import org.rut.util.algorithm.support.ImprovedQuickSort; l+#uQo6cqQ
import org.rut.util.algorithm.support.InsertSort; $/kZKoF{f
import org.rut.util.algorithm.support.MergeSort; 7o7*g 7
import org.rut.util.algorithm.support.QuickSort; SUb:0GUa
import org.rut.util.algorithm.support.SelectionSort; NtG^t}V
import org.rut.util.algorithm.support.ShellSort; {U)q)
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/** Y#zHw<<E
* @author treeroot sZ>0*S
* @since 2006-2-2 2AXf'IOqE
* @version 1.0 ?$6(@>`f&t
*/ d$HPpi1LL
public class SortUtil { v[4-?7-
public final static int INSERT = 1; lNo]]a+_
public final static int BUBBLE = 2; ,R}9n@JI^Y
public final static int SELECTION = 3; ^4C djMF-E
public final static int SHELL = 4; S@@#L
public final static int QUICK = 5; !>?*gc.<
public final static int IMPROVED_QUICK = 6; Y^QG\6q
public final static int MERGE = 7; C ~Doj
public final static int IMPROVED_MERGE = 8; 'd]t@[#
public final static int HEAP = 9; h,ipQ>
GE*%I1?]
public static void sort(int[] data) { 07G'"=
sort(data, IMPROVED_QUICK); 98*C/=^TH{
} hz+c]K
private static String[] name={ M Al4g+es
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `h~-
}; fuT Bh6w&
0*,]`A=
private static Sort[] impl=new Sort[]{ m>f8RBp]'
new InsertSort(), o|APsQE
new BubbleSort(), 7.tIf <^$P
new SelectionSort(), |`pDOd
new ShellSort(), GsoD^mjY
new QuickSort(), UHS"{%
new ImprovedQuickSort(), M9.FtQhK/
new MergeSort(), @CS%=tE}U
new ImprovedMergeSort(), qb$M.-\ne
new HeapSort() \s6VOR/
}; :)F0~Q
oxug
public static String toString(int algorithm){ y?UB?2VN
return name[algorithm-1]; Bo;{ QoB
} x$z>.4
-d[Gy- J
public static void sort(int[] data, int algorithm) { 6$t+Q~2G!
impl[algorithm-1].sort(data); X2`n&JE
} a28`)17z
NbK67p:
public static interface Sort { 8{)N%r
public void sort(int[] data); |(=b
} 7w}]9wCN?
a&Me#H{
public static void swap(int[] data, int i, int j) { juQ?k xOB
int temp = data; T2TWb
data = data[j]; fs2y$HN
data[j] = temp; +&.39q!
} 4MoxP
} v)~!HCG