[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; s3LR6Z7;i
} vs)1Rm
int i1=l; yfD)|lK
int i2=mid+1; t,8p}2,$
for(int cur=l;cur<=r;cur++){ qt#a_F*rV
if(i1==mid+1) 3C8W]yw/s
data[cur]=temp[i2++]; &$?i
else if(i2>r) |5}~n"R5
data[cur]=temp[i1++]; GAlAFsB
else if(temp[i1] data[cur]=temp[i1++]; B!hrr
else -pRyN]YD
data[cur]=temp[i2++]; lj1wTiaI(
} Bkn- OG
} 3-Q*umh
;5P>R[p
} "5-S:+
FJN,er~T[
改进后的归并排序: V^t5 Y+7
35;)O -
package org.rut.util.algorithm.support; =9 TAs? =
U/B1/96lJ
import org.rut.util.algorithm.SortUtil; up~l4]b+
I54O9Aoy
/** $FgpFxz;
* @author treeroot bT@7&
* @since 2006-2-2 C/Ig.KmXF{
* @version 1.0 Hy<4q^3$G
*/ UC^Bn1
public class ImprovedMergeSort implements SortUtil.Sort { Qhnz7/a9
<%JRZYZ
private static final int THRESHOLD = 10; X,/@#pSOz
FxKb
/* E5lC'@Dcz
* (non-Javadoc) `he{"0U~S
* :\*hAV1i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qVFz-!6b
*/ gFvFd:"uZ
public void sort(int[] data) { =L$};ko
int[] temp=new int[data.length]; >qn@E?Uf
mergeSort(data,temp,0,data.length-1); kRgyvA,*;
} AAsl)
&b}!KD1
private void mergeSort(int[] data, int[] temp, int l, int r) { 4yC{BRbi
int i, j, k; YE5v~2
int mid = (l + r) / 2; 0.nS306
if (l == r) -9{}rE
return; Jug1Va<^c
if ((mid - l) >= THRESHOLD) o><~.T=d&
mergeSort(data, temp, l, mid); ..7"&-?g{4
else gtz!T2%
insertSort(data, l, mid - l + 1); +I2P{7
if ((r - mid) > THRESHOLD) -(>x@];r0
mergeSort(data, temp, mid + 1, r); 1uv"5`%s
else =[`wyQe`_
insertSort(data, mid + 1, r - mid); 9U58#
IqEY.2KN
for (i = l; i <= mid; i++) { h GS";g[?
temp = data; x}1(okc
} "twV3R
for (j = 1; j <= r - mid; j++) { ;4F[*VF!w
temp[r - j + 1] = data[j + mid]; l~&efAJ-$
} [j}%&$
int a = temp[l]; vsoj] R$C
int b = temp[r]; v(<~:]
for (i = l, j = r, k = l; k <= r; k++) { 2=!/)hw}
if (a < b) { |82V`CV
data[k] = temp[i++]; b_Ba0h=
a = temp; X!,Ngmw.
} else { nH% /
data[k] = temp[j--]; "C=HBJdYB5
b = temp[j]; 1&QI1fvx
} Bi kCjP[b
} 7=T0Sa*;
} 3 %dbfT j
fQuphMOl6
/** )R,*
* @param data PpU : 4;en
* @param l HK&F'\'}
* @param i zK:/ 1
*/ ":"M/v%F
private void insertSort(int[] data, int start, int len) { )OH!<jW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {(7.X4\x
} FNmIXpAn*@
} N4fuV?E`
} M9f*7{c
} TF=S \ Q
N.-Ryj&9
堆排序： }doj4
5YC(gv3/
package org.rut.util.algorithm.support; 2s6Vy
)-jvp8%BK
import org.rut.util.algorithm.SortUtil; `fc*/D
oTx#e[8f{
/** ARU,Wtj#
* @author treeroot }JlQQ
* @since 2006-2-2 Rut6m5>
* @version 1.0 k+i}U9c"
*/ CSsb~/Oxu
public class HeapSort implements SortUtil.Sort{ UZ](X/
orHVL2 KK
/* (non-Javadoc) qHHWe<}OT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }qlz^s
*/ &kO4^ A
public void sort(int[] data) { s}?98?tYB
MaxHeap h=new MaxHeap(); HPpnw]_
h.init(data); /VJ@`]jhDf
for(int i=0;i h.remove(); R9#Z=f,
System.arraycopy(h.queue,1,data,0,data.length); s{iYf :
} Rwy:.)7B$q
t"BpaA^gO
private static class MaxHeap{ B2Orw8F
"+XO[WGc
void init(int[] data){ )m)>k` 0
this.queue=new int[data.length+1]; ^WD[>E~
for(int i=0;i queue[++size]=data; 7rr5$,Mv
fixUp(size); )?TJ{'m
} b?y1cxTT
} 9td(MZ%i~N
<B``/EX^
private int size=0; j5/H#_.
*aT!|;
private int[] queue; c2F`S1Nu<
]mqB&{g
public int get() { f9\7v_
return queue[1]; 6"=e+V@
} a\MU5%}\
hi ]+D= S
public void remove() { @\q~OyV
SortUtil.swap(queue,1,size--); "3>#[o
fixDown(1); [%h^qJ
} ipyO&v
file://fixdown :#|77b0
private void fixDown(int k) { @rJ#Dr
int j; > voUh;L
while ((j = k << 1) <= size) { Jq; }q63:
if (j < size %26amp;%26amp; queue[j] j++; ! TRiFD
if (queue[k]>queue[j]) file://不用交换 +5HOT{wj
break; [ z&y]~
SortUtil.swap(queue,j,k); --/ .
k = j; 4%]{46YnK
} dZYS5_wr
} |0bSxPXn!
private void fixUp(int k) { >AfJxdd1
while (k > 1) { yqYX<<!V
int j = k >> 1; !C+25vup
if (queue[j]>queue[k]) onmO>q*
break; UU !I@
SortUtil.swap(queue,j,k); # K-Q/*
k = j; {C6Yr9
} !eO?75/
} E7D^6G&i
[n^___7
} t+#Ss v8
2n7[Op
} gGX/p6"
LnL<WI*Pq
SortUtil： p;H1,E:Re#
TRiB|b]8Q#
package org.rut.util.algorithm; z/TZOFaM
kOjq LA
import org.rut.util.algorithm.support.BubbleSort; Ue\&
import org.rut.util.algorithm.support.HeapSort; uI%[1`2N-
import org.rut.util.algorithm.support.ImprovedMergeSort; 9QYU J
import org.rut.util.algorithm.support.ImprovedQuickSort; 1jF}g`At
import org.rut.util.algorithm.support.InsertSort; [|>.iH X
import org.rut.util.algorithm.support.MergeSort; xM*v!J,
import org.rut.util.algorithm.support.QuickSort; N;w1f"V}
import org.rut.util.algorithm.support.SelectionSort; qd.b&i
import org.rut.util.algorithm.support.ShellSort; 9}\T?6?8pX
#eaey+~
/** 6xOR,p>E
* @author treeroot [Cs2H8=#
* @since 2006-2-2 3HA{18{4uP
* @version 1.0 %iGME%oXr
*/ ;EJ6C#} >7
public class SortUtil { n-\B z.
public final static int INSERT = 1; LY|h*a6Ym
public final static int BUBBLE = 2; 4*54"[9Hr#
public final static int SELECTION = 3; 9-@w(kMu
public final static int SHELL = 4; ?e@Ff"Y@e
public final static int QUICK = 5; @-m&X2J+c
public final static int IMPROVED_QUICK = 6; -py.YZ
public final static int MERGE = 7; 5GY%ZRHh
public final static int IMPROVED_MERGE = 8; XI0O^[/n{
public final static int HEAP = 9; &x;nP6mV
"<&F=gV
public static void sort(int[] data) { 0>'1|8+`(z
sort(data, IMPROVED_QUICK); R_*\?^k|A
} tQ)8HVKF
private static String[] name={ $a-~ozr`C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 55;xAsG
}; -r,J>2`l
ctCfLlK
private static Sort[] impl=new Sort[]{ eL(T
new InsertSort(), a"v D+r7Ol
new BubbleSort(), 2"mO"2d%
new SelectionSort(), I8[G!u71)_
new ShellSort(), H"-p^liw
new QuickSort(), qV^H vZJ
new ImprovedQuickSort(), 3!d|K%J
new MergeSort(), a@ lK+t
new ImprovedMergeSort(), KomF)KQ2r
new HeapSort() fer'2(G?W
}; J#D!J8KP7
?>,aq>2O$
public static String toString(int algorithm){ B@F1!8l
return name[algorithm-1]; 4Q]+tXes
} -aO3/Ik[q
QQ?` 1W
public static void sort(int[] data, int algorithm) { @^P=jXi<
impl[algorithm-1].sort(data); UdY9*k
} 9]S}m[8k
G U!XD!!&
public static interface Sort { PGybX:L
public void sort(int[] data); +/Z:L$C6
} d8x$NW-s
")LF;e
public static void swap(int[] data, int i, int j) { VRxBi!d
int temp = data; hslJs^
data = data[j]; *m|]c4
data[j] = temp; }R J2\CP
} B4{A(-Tc
} EJ86k>]