[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; wW\@^5
} [5p9p1@u{C
int i1=l; @U5gxK*
int i2=mid+1; 9]IZ3 fQX
for(int cur=l;cur<=r;cur++){ <af# C2`B
if(i1==mid+1) ,v8e7T
data[cur]=temp[i2++]; |w*s:p
else if(i2>r) Fd<Ouyxqe
data[cur]=temp[i1++]; mL`8COA
else if(temp[i1] data[cur]=temp[i1++]; p$1 'e,G
else "ufSHrZv
data[cur]=temp[i2++]; Z@Q*An
} 6X h7Bx1
} v(.mM9>
OH2IO
} BX[IWP\%
GyQFR?
改进后的归并排序: /K&9c !]$C
Q?>r:vMi
package org.rut.util.algorithm.support; e3CFW_p
ky[Cx!81C
import org.rut.util.algorithm.SortUtil; 0:[A4S`X
L QV@]z&
/** ,(x`zpp _
* @author treeroot }>BNdm"Er
* @since 2006-2-2 Bj\ x
* @version 1.0 ~"`e9Im
*/ hjg1By(
public class ImprovedMergeSort implements SortUtil.Sort { .p e3L7g
er3~gm
private static final int THRESHOLD = 10; ^lV}![do!
V>)/z|[
/* qfJ2iE|o2.
* (non-Javadoc) dyn)KDS
* ~%>i lWaHB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0$Rn|yqf%
*/ ~\NQkaBkY
public void sort(int[] data) { |Vz)!M
int[] temp=new int[data.length]; ]`x+wWe
mergeSort(data,temp,0,data.length-1); q`2dL)E
} ">wvd*w0"(
(!{*@?S
private void mergeSort(int[] data, int[] temp, int l, int r) { U~ a\v8l~
int i, j, k; @Drl5C}+
int mid = (l + r) / 2; #!O)-dyF
if (l == r) Jaw1bUP!oK
return; !|4]V}JQ
if ((mid - l) >= THRESHOLD) _dk[k@5W{'
mergeSort(data, temp, l, mid); *Ts$Hj[
else "QXnE^
insertSort(data, l, mid - l + 1); \a;xJzc9
if ((r - mid) > THRESHOLD) -avxH?;?7
mergeSort(data, temp, mid + 1, r); >e6OlIW
else ]h`*w
insertSort(data, mid + 1, r - mid); 18F}3t??
0g:q%P0
for (i = l; i <= mid; i++) { >fP;H}S6
temp = data; KQ]sUNH
} ZXb{-b?[`
for (j = 1; j <= r - mid; j++) { M1m]1<
temp[r - j + 1] = data[j + mid]; Xv!Gg6v6
} fWEQ vQ
int a = temp[l]; M("sekL
int b = temp[r]; w#A\(z%;x
for (i = l, j = r, k = l; k <= r; k++) { <CO_JWD
if (a < b) { l59\Lo:
data[k] = temp[i++]; Z9M$*Zp
a = temp; )Hin{~h
} else { >&+V[srfD
data[k] = temp[j--]; LBD],Ba!
b = temp[j]; Jb*QlsGd
} %p)&mYK{
} 3)W_^6>bM
} HJg&fkHn1
|^5"-3Q
/** BrSvkce
* @param data C=&n1/
* @param l NYHK>u/5c
* @param i PA ZjA0d
*/ zL+t&P[\
private void insertSort(int[] data, int start, int len) { Ip7#${f5M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "!vY{9,
} n!Y_SPg
} v+{{j|x=
} ELnUpmv\
} cFq<x=S
-DHzBq=H
堆排序： Ow>u!P!
K5LJx-x*j
package org.rut.util.algorithm.support; diu"Nt
&':C"_|&r
import org.rut.util.algorithm.SortUtil; cd1-2-4U
Zx{Sxv"
/** \`~YW<D
* @author treeroot ]3,9."^
* @since 2006-2-2 sk9Ejaf6>
* @version 1.0 (OES~G
*/ [8Y7Q5Had
public class HeapSort implements SortUtil.Sort{ |Y}YhUI&
r@r*|50
/* (non-Javadoc) ^(+q1O'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fl($0}ER
*/ baG_7>Q9H
public void sort(int[] data) { .up[wt gN
MaxHeap h=new MaxHeap(); U'F}k0h?\'
h.init(data); dO2?&f
for(int i=0;i h.remove(); .GJbrz
System.arraycopy(h.queue,1,data,0,data.length); j$_?g!I=gK
} q 6UZ`9&z
lbt8S.fx
private static class MaxHeap{ D1-w>Y#
pm=O.)g4`
void init(int[] data){ Ag\RLJ.KD
this.queue=new int[data.length+1]; 5>%^"f
for(int i=0;i queue[++size]=data; U`3?bhzua
fixUp(size); x^)?V7[t
} xa'U_]m
} V#$QKn`;
k?Hi_;o
private int size=0; d m"R0>
Wf"$
private int[] queue; S)zw[m
9*FA=E
public int get() { U}X'RCM
return queue[1]; JXkx!X_{
} vjGJRk|XED
=/a`X[9vI
public void remove() { 0$`pYW]
SortUtil.swap(queue,1,size--); ] +%`WCr9
fixDown(1); z6M5'$\y
} ^,=}'H]
file://fixdown ~28{BY
private void fixDown(int k) { 9A4n8,&sm
int j; v `/nX->
while ((j = k << 1) <= size) { cu?6\@cD
if (j < size %26amp;%26amp; queue[j] j++; Xp<O
if (queue[k]>queue[j]) file://不用交换 %KO8i)n
break; viU}
SortUtil.swap(queue,j,k); B=>Xr!pM!
k = j; lt4IoE`tk?
} 1yF9zKs&_
} <?KgzIq2
private void fixUp(int k) { sdCG}..`
while (k > 1) { V}<<?_
int j = k >> 1; fFbJE]jW
if (queue[j]>queue[k]) P]}:E+E<.I
break; 11QZ- ^
SortUtil.swap(queue,j,k); j^b&Q
k = j; L T`T~|pz
} YY tVp_)
} Y'P^]Q=}_#
k~<Ozx^AyY
} 6@#=z
+|S)Mm8-
} BR@gJ(2
LC=M{\
SortUtil： K%%Ow
I&15[:b=-
package org.rut.util.algorithm; }vB{6E+h/w
"dndhoMq
import org.rut.util.algorithm.support.BubbleSort; !X"nN9k
import org.rut.util.algorithm.support.HeapSort; aDz% %%:r
import org.rut.util.algorithm.support.ImprovedMergeSort; +ah4 K(+3
import org.rut.util.algorithm.support.ImprovedQuickSort; -ys/I,}<
import org.rut.util.algorithm.support.InsertSort; #gWok'ZcR
import org.rut.util.algorithm.support.MergeSort; rLD1Cpeb,w
import org.rut.util.algorithm.support.QuickSort; @~$=96^
import org.rut.util.algorithm.support.SelectionSort; KMb'm+
import org.rut.util.algorithm.support.ShellSort; $Nvox<d0
)2W7>PY
/** -u~:Gd*l0
* @author treeroot 8%4v6No&*
* @since 2006-2-2 :+9. v
* @version 1.0 k "7,-0gz
*/ d/oD]aAEr
public class SortUtil { h8.(Q`tli
public final static int INSERT = 1; 0nI*9
public final static int BUBBLE = 2; `3[W~Cq
public final static int SELECTION = 3; {7IZN< e
public final static int SHELL = 4; {be|G^.c
public final static int QUICK = 5; A`vRUl,c=
public final static int IMPROVED_QUICK = 6; :SN?t
public final static int MERGE = 7; OBlQ
public final static int IMPROVED_MERGE = 8; j4@6`[n:
public final static int HEAP = 9; mBrZ{hqS
h8M}}
public static void sort(int[] data) { /;q3Q#
sort(data, IMPROVED_QUICK); ;H%'K
} ,{iMF (Nj
private static String[] name={ po]<sB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g] IPNW^n
}; i/8OC
p|0SA=?k"
private static Sort[] impl=new Sort[]{ >3p8o@:
new InsertSort(), *hFJI9G
new BubbleSort(), UDkH'x$=
new SelectionSort(), +('xzW
new ShellSort(), Xsb.xxK.
new QuickSort(), s;Zi
new ImprovedQuickSort(), 56C'<#
new MergeSort(), _8`S&[E?
new ImprovedMergeSort(), P%w!4v~"
new HeapSort() |,.1=|&u
}; ~|{e"!(}
6eB~S)Ko
public static String toString(int algorithm){ V.Lk70 \
return name[algorithm-1]; o4rf[.z
} bTYR=^9
g rQ,J
public static void sort(int[] data, int algorithm) { _,Q -)\
impl[algorithm-1].sort(data); i[33u p
} Mp5Z=2l5
.Q</0*sp
public static interface Sort { ed/ "OgA
public void sort(int[] data); =y?Aeqq\fl
} p*zTuB~e<
@1k-h;`,
public static void swap(int[] data, int i, int j) { tnb'\}Vn
int temp = data; E7SmiD@)
data = data[j]; n*AN/LBp
data[j] = temp; N^[MeG,8
} 5P);t9O6
} Ho%%voJBS