[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; I@y2HxM
} R#[QoyJ
int i1=l; ?15POY ?Z
int i2=mid+1; "jkw8UVz
for(int cur=l;cur<=r;cur++){ QZ:]8MHl]
if(i1==mid+1) < -@,
data[cur]=temp[i2++]; nr<}Hc^f-
else if(i2>r) A>&>6O4
data[cur]=temp[i1++]; es*_Oo1
else if(temp[i1] data[cur]=temp[i1++]; s>9z+;~!
else %l9WZ*yZ`2
data[cur]=temp[i2++]; F3H:I"4
} _oMs `"4K
} 5JXzfc9rL
u"Hd55"&
} / y":/"h
:$X4#k<
改进后的归并排序: A{{q'zb!
a[d{>Fb.
package org.rut.util.algorithm.support; i;uG:,ro
Gdc~Lh
import org.rut.util.algorithm.SortUtil; &VZmP5Gv
!h`cXY~w
/** _{Fdw
* @author treeroot K~fDv i
* @since 2006-2-2 s%S_K
* @version 1.0 D>"{H7mY
*/ Qw{\sCH>
public class ImprovedMergeSort implements SortUtil.Sort { zBrWm_R5T
%~8](]p
private static final int THRESHOLD = 10; 3;-@<9
Jnu}{^~
/* rSc,\upz
* (non-Javadoc) a?xq*|?
* bH)8UQR%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *x#&[>
*/ )N%1%bg^-
public void sort(int[] data) { (c*7VO;
int[] temp=new int[data.length]; O>o}<t7
mergeSort(data,temp,0,data.length-1); |GVGny<
} &EbD.>Ci
dl3LDB
private void mergeSort(int[] data, int[] temp, int l, int r) { !Xv2PdP
int i, j, k; i\DHIzGp[
int mid = (l + r) / 2; ]y)R C-N
if (l == r) ;nAg4ll8Q
return; 7zJh;f/
if ((mid - l) >= THRESHOLD) ^V0{Ew/x
mergeSort(data, temp, l, mid); ;?HZ,"^I
else AT'_0>x8
insertSort(data, l, mid - l + 1); 'nj&}A'
if ((r - mid) > THRESHOLD) fjK]m.w
mergeSort(data, temp, mid + 1, r); 4LKs'$:A=
else %RT6~0z
insertSort(data, mid + 1, r - mid); J!TK*\a2
_sf0{/< )
for (i = l; i <= mid; i++) { 6{Cu~G{]N
temp = data; J:TI>*tn
} Zc' >}X[G
for (j = 1; j <= r - mid; j++) { O>"r. sR
temp[r - j + 1] = data[j + mid]; ,N@Icl
} v[3hnLN%
int a = temp[l]; e$xv[9
int b = temp[r]; 0z'={6,
for (i = l, j = r, k = l; k <= r; k++) { wEHrer
if (a < b) { 6GrMcI@hS
data[k] = temp[i++]; }:c,SO!
a = temp; G~iYF(:&
} else { q3pN/f;kr,
data[k] = temp[j--]; r* /XB0
b = temp[j]; }T1Xds8w)t
} z7us*8X{
} nm:let7GB
} V~uA(3\U
e2=,n6N]c
/** -R8!"~o
* @param data =ZJ?xA8
* @param l U~B}vt
* @param i =Gg)GSL^
*/ 2I(@aB+
private void insertSort(int[] data, int start, int len) { w]5f3CIm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MF`k~)bDV
} >.nt'BQ
} "<n"A7e
} /x8C70W^
} :]z-Rz
zHum&V8=H
堆排序： Mbi+Vv-
~bWWu`h
package org.rut.util.algorithm.support; z1@sEfk>
JjTzq2'%
import org.rut.util.algorithm.SortUtil; DRg~HT
Tdmo'"m8z_
/** ,%b1 ]zZQ
* @author treeroot (.nJT"&
* @since 2006-2-2 jv#" vQ9A]
* @version 1.0 'N5r2JL[w
*/ t=pkYq5t8
public class HeapSort implements SortUtil.Sort{ '/qe#S
F>_lp,G
/* (non-Javadoc) E#X!*q&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WSB|-Qj}W
*/ M(]|}%
public void sort(int[] data) { n)?F 9Wap
MaxHeap h=new MaxHeap(); o? xR[N-J
h.init(data); bHH}x"d[x
for(int i=0;i h.remove(); !.GY~f<d$
System.arraycopy(h.queue,1,data,0,data.length); Q,qylL
} O/r<VTOp
A)p!w aG
private static class MaxHeap{ aFc'_FrQ
Y(!)G!CMc
void init(int[] data){ UmI@":|-
this.queue=new int[data.length+1]; YU\t+/b
for(int i=0;i queue[++size]=data; 3SB7)8Id1
fixUp(size); }lvP|6Y: y
} HE<%d
} r-"`Abev
)Jjw}}$}Y
private int size=0; pS)X\Xyw
)mZy>45
private int[] queue; 3z. >b
bDh(;%=
public int get() { 0c;"bA0>Sx
return queue[1]; o!dkS/u-m
} = Ow&UI
*l8vCa9Y
public void remove() { [x()^{;2
SortUtil.swap(queue,1,size--); d_|v=^;
fixDown(1); ]{,=mOk
} ~hw4gdtS
file://fixdown uH;^>`DT
private void fixDown(int k) { $gtT5{"PN(
int j; KUn5S&eB
while ((j = k << 1) <= size) { "dU#j,B2
if (j < size %26amp;%26amp; queue[j] j++; 8o5^H>
if (queue[k]>queue[j]) file://不用交换 c+M@{EbuN
break; J0)WRn"h
SortUtil.swap(queue,j,k); S gsR;)2
k = j; =,;3z/k%
} `2~Ea_Z
} X OtS+p
private void fixUp(int k) { (%IstR|u:
while (k > 1) { v+2qR0,LM
int j = k >> 1; Oes+na'^
if (queue[j]>queue[k]) NP(?[W
break; }z2-|"H
SortUtil.swap(queue,j,k); [eik<1=,~?
k = j; V1V4 <Zj
} w [x+2
} Z]+Xh
8l,hP.
} [GT1,(}. Z
p2?+[d
} /r{5Lyk*
U"G+su->e
SortUtil： o;P;=<
(NV=YX?s
package org.rut.util.algorithm; WD1$"}R
4Lq]yUj
import org.rut.util.algorithm.support.BubbleSort; q&S.C9W
import org.rut.util.algorithm.support.HeapSort; Mj;'vm7#'
import org.rut.util.algorithm.support.ImprovedMergeSort; G7{:d
import org.rut.util.algorithm.support.ImprovedQuickSort; ?S7:KnU>K
import org.rut.util.algorithm.support.InsertSort; ;rdLYmmx^
import org.rut.util.algorithm.support.MergeSort; ]lG\t'R
import org.rut.util.algorithm.support.QuickSort; &otgN<H9
import org.rut.util.algorithm.support.SelectionSort; i58CA?
import org.rut.util.algorithm.support.ShellSort; Yx/~8K_%M?
.`=PE&xq
/** JEkVj']?
* @author treeroot 9r*T3=u.S
* @since 2006-2-2 a8U2c;
* @version 1.0 F!t13%yeu?
*/ laJ%fBWmbi
public class SortUtil { w~-d4MNM
public final static int INSERT = 1; 9!C?2*>A P
public final static int BUBBLE = 2; Z'kYf
public final static int SELECTION = 3; bW3o%srxa
public final static int SHELL = 4; wZb@VG}%
public final static int QUICK = 5; a6#PZ!1
public final static int IMPROVED_QUICK = 6; ^aoLry&i=
public final static int MERGE = 7; 6Ky"4\e
public final static int IMPROVED_MERGE = 8; W5;sps
public final static int HEAP = 9; LA Vgf>
{vlh,0~
public static void sort(int[] data) { &y?B&4|hM
sort(data, IMPROVED_QUICK); Om~C0
} ikiy>W8
private static String[] name={ $KFWV2P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uV:;y}T^Z
}; p7tC~]r:L
D:,<9%A
private static Sort[] impl=new Sort[]{ j!H?dnE||
new InsertSort(), 0g)mf6}o
new BubbleSort(), g?M69~G$:x
new SelectionSort(), r!uAofIi_
new ShellSort(), &|;!St]!M
new QuickSort(), GTe9@d
new ImprovedQuickSort(), bV,R*C
new MergeSort(), @/iLC6QF
new ImprovedMergeSort(), ti% e.p0[
new HeapSort() Uij$ eBN
}; K`<P^XJr
@jeV[N,0
public static String toString(int algorithm){ o(qmI/h
return name[algorithm-1]; "j>0A Hem
} \H(,'w7H
+[DVD
public static void sort(int[] data, int algorithm) { gk`.8o
impl[algorithm-1].sort(data); s1q d/
} S22;g
uIwyan-
public static interface Sort { lEs/_f3;A
public void sort(int[] data); 3!x)LUWfWY
} )9->]U@
de=T7,G#
public static void swap(int[] data, int i, int j) { LlqhZetS
int temp = data; .&dcJh*O+
data = data[j]; fok#D>q
data[j] = temp; K-5)Y+| >
} &x #5-O'
} >?KyPp