[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; T]tG,W1>i
} [:!D.@h|
int i1=l; hVAP )"5
int i2=mid+1; ekj@;6 d]
for(int cur=l;cur<=r;cur++){ J0vCi}L
if(i1==mid+1) s1eGItx[w
data[cur]=temp[i2++]; g :me:M
else if(i2>r) 5-ju5z?=
data[cur]=temp[i1++]; K8UgP?c;0
else if(temp[i1] data[cur]=temp[i1++]; elBmF#,j7
else _g(4-\
data[cur]=temp[i2++]; YQI&8~z
} @Gj|X>0
} MQv2C@K9F
Ux Yb[Nbc
} KF[P /cFI
MH>CCT
改进后的归并排序: /J"U`/ {4
[z1[4
package org.rut.util.algorithm.support; T53|*~u
.D`""up|{
import org.rut.util.algorithm.SortUtil; G3&l|@5
q! +?
/** C?3?<FDL
* @author treeroot [o=v"s't)
* @since 2006-2-2 <d\Lvo[
* @version 1.0 9)a:8/Y
*/ /k(KA [bS
public class ImprovedMergeSort implements SortUtil.Sort { "c6(=FFq
6-@ X
private static final int THRESHOLD = 10; Y!6,ty'
]~SOGAFW
/* m};Qng]
* (non-Javadoc) 'o#ve72z1
* <XV\8Y+n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d+Vx:`tT
*/ :{d?B$
public void sort(int[] data) { nSL x1Q
int[] temp=new int[data.length]; _[,oP s:+
mergeSort(data,temp,0,data.length-1); 'Zdjd]
} xi]qdiA
'ju{j`b
private void mergeSort(int[] data, int[] temp, int l, int r) { 0!c^pOq6
int i, j, k; qe!\ oh
int mid = (l + r) / 2; B!=JRfT
if (l == r) u*ZRU 4U
return; *jps}uk<
if ((mid - l) >= THRESHOLD) Vn`-w
mergeSort(data, temp, l, mid); etEm#3
else {:VUu?5-t;
insertSort(data, l, mid - l + 1); szY=N7\S*
if ((r - mid) > THRESHOLD) k{op,n#
mergeSort(data, temp, mid + 1, r); Q]Fm4
else 'Lw4jq
insertSort(data, mid + 1, r - mid); z@nJ-*'U8
pm-SDp>s
for (i = l; i <= mid; i++) { Zjz< Q-
temp = data; wsyG~^>
} N|v3a>;*l
for (j = 1; j <= r - mid; j++) { n_Ht{2I
temp[r - j + 1] = data[j + mid]; /N`l z>^~
} TS9=A1J#
int a = temp[l]; i9.~cnk
int b = temp[r]; h]rF2 B
for (i = l, j = r, k = l; k <= r; k++) { Gu-*@C:^&
if (a < b) { 0k?ph$
data[k] = temp[i++]; QPf#y7_@u
a = temp; vpy_piG|
} else { gxX0$\8o7
data[k] = temp[j--]; p:9)}y
b = temp[j]; KB$s7S"=
} GT[,[l
} !H`Q^Xf}
} w7H.&7rF
ZI q!ee
/** kMGK8y
* @param data &95iGL28Q
* @param l s}]qlg
* @param i sbZ$h <
*/ P<+5So0
private void insertSort(int[] data, int start, int len) { 18|i{fE;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;* vVucx
} zDbjWd
} 1sL#XB$@N
} L~yu
} %-y%Q.;k?
%ec9`0^4S
堆排序： (o/HLmr@Y
S~QL x
package org.rut.util.algorithm.support; =X(8[ e
m@hmu}qz-
import org.rut.util.algorithm.SortUtil; WKf->W
K|-?1)Um
/** pSQ)DqW
* @author treeroot y9?~^pTx
* @since 2006-2-2 uaMf3HeYV
* @version 1.0 B5>1T[T'-
*/ 7Vf2Qx1_
public class HeapSort implements SortUtil.Sort{ "T/ vE
H+:SL $+<o
/* (non-Javadoc) pu(a&0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 03ol!|X"9
*/ -e"~UDq`
public void sort(int[] data) { yub|
MaxHeap h=new MaxHeap(); D|W^PR:@h
h.init(data); oT7=
for(int i=0;i h.remove(); $2uZdl8Rvj
System.arraycopy(h.queue,1,data,0,data.length); >:whNp
} "HRoS#|\
uqy b
private static class MaxHeap{ M{U{iS
J`U\3:b`SP
void init(int[] data){ ;$|[z<1RdW
this.queue=new int[data.length+1]; 3PB#m.N<
for(int i=0;i queue[++size]=data; P@ewr}
fixUp(size); @add'>)
} Ju""i4
} EP.nVvuL
`I(#.*
private int size=0; SF.4["$
s)#8>s-
private int[] queue; {{b&l!
MS~c $
public int get() { C9-IJj
return queue[1]; \{F{yq(
} u~#QvA~]
Y$0Y_fm%
public void remove() { 9$&+0
SortUtil.swap(queue,1,size--); cPh U qET
fixDown(1); H6ff b)&
} U$[C>~r
file://fixdown TqbDj|7`R
private void fixDown(int k) { \\80c65-
int j; jd9GueV*(
while ((j = k << 1) <= size) { -LF0%G
if (j < size %26amp;%26amp; queue[j] j++; +u1meh3u
if (queue[k]>queue[j]) file://不用交换 h_K(8{1
break; 49%qBO$R
SortUtil.swap(queue,j,k); @SREyqC4
k = j; VvuwgJX
} Mp:/[%9Fi
} ?Z-(SC
private void fixUp(int k) { !xs.[&u8
while (k > 1) { rixP[`!]x
int j = k >> 1; h+e Oe}
if (queue[j]>queue[k]) si.A"\bm
break; i)nb^
SortUtil.swap(queue,j,k); 4q"x|}a
k = j; ^h+,Kn0@
} YqsN#E3pf
} G[4TT#
xOCHP|?
} OhmKjY/}
% AqUVt9}
} "mbcZ5_
x{Y}1+Y4
SortUtil： shbPy
Nz`4q%+
package org.rut.util.algorithm; AV0m31b
nQuiRTU<
import org.rut.util.algorithm.support.BubbleSort; b#U nE
import org.rut.util.algorithm.support.HeapSort; vn"2"hPF|
import org.rut.util.algorithm.support.ImprovedMergeSort; 8spoDb.S
import org.rut.util.algorithm.support.ImprovedQuickSort; z=TaB^-)
import org.rut.util.algorithm.support.InsertSort; > Y <in/
import org.rut.util.algorithm.support.MergeSort; `ReTfz;o
import org.rut.util.algorithm.support.QuickSort; QJc3@
import org.rut.util.algorithm.support.SelectionSort; ~b+TkPU
import org.rut.util.algorithm.support.ShellSort; Qq;` 9-&j
8'Dp3x^W>
/** W=T3spV
* @author treeroot KlMrM% ;y
* @since 2006-2-2 %} WSw~X
* @version 1.0 y2k'^zE
*/ jU2Dpxkt
public class SortUtil { %Gp%l
public final static int INSERT = 1; JzD Mx?
public final static int BUBBLE = 2; ,-PzUR4_Kj
public final static int SELECTION = 3; gakmg#ki
public final static int SHELL = 4; qms+s~oA
public final static int QUICK = 5; qbjBN z
public final static int IMPROVED_QUICK = 6; Ov1$7 r@
public final static int MERGE = 7; /0Q=}:d
public final static int IMPROVED_MERGE = 8; Ad)Po
public final static int HEAP = 9; 9] /xAsD
h^klP:Q
public static void sort(int[] data) { a.+2h%b
sort(data, IMPROVED_QUICK); 0z) 8i P
} O)nLV~X
private static String[] name={ Js7(TFQE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" " , c1z\
}; >r%L=22+
"KQ3EI/g
private static Sort[] impl=new Sort[]{ dR"H,$UH
new InsertSort(), 5Hvg%g-c
new BubbleSort(), :TU;%@7
new SelectionSort(), %M{qr!?uj
new ShellSort(), z-|gw.y
new QuickSort(), pKDP1S#<
new ImprovedQuickSort(), 8Xpf|?.
new MergeSort(), ok;Yxp>
new ImprovedMergeSort(), M<Mr L[*j
new HeapSort() 7Iu^l4=2
}; hS]g^S==2h
[r'PGx
public static String toString(int algorithm){ ;-p1z% u
return name[algorithm-1]; SH>L3@Za
} Az4+([
nU]n]gd
public static void sort(int[] data, int algorithm) { B6)d2O9C
impl[algorithm-1].sort(data); DQ7+
} =}N&c4I[j
Gt4| ]
public static interface Sort { {~.~ b+v
public void sort(int[] data); "&jA CI
} )%rGD =2~
X|+o4R?
public static void swap(int[] data, int i, int j) { z@\C/wX
int temp = data; R;,&s!\<
data = data[j]; N6wea]
data[j] = temp; cIqk=_]
} aty"6~
} 4Q2=\-KFj