[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; 420yaw/":
} L ^{C4}x=
int i1=l; NPE7AdB8
int i2=mid+1; 5*r5?ne
for(int cur=l;cur<=r;cur++){ {@T<eb$d
if(i1==mid+1) >D*%1LH~V
data[cur]=temp[i2++]; H.[t&VO
else if(i2>r) /7yd&6`I
data[cur]=temp[i1++]; hO4* X
else if(temp[i1] data[cur]=temp[i1++]; 7N[Cs$_]
else u#v];6N
data[cur]=temp[i2++]; .oxeo0@~
} z#{%[X2
} K{]\}7+
17B`
} gYvT'72
aDjYT/`l
改进后的归并排序: kaZ_ra;<
>Mk#19j[/
package org.rut.util.algorithm.support; 3Vb/Mn!k
??=su.b
import org.rut.util.algorithm.SortUtil; wlfq$h p
5:X^Q.f;
/** vU,;asgy
* @author treeroot &3bhK5P
* @since 2006-2-2 IyGW>g6_.
* @version 1.0 khfWU
*/ 6eAJ>9@x
public class ImprovedMergeSort implements SortUtil.Sort { =FXq=x%9+
@!2vS@f
private static final int THRESHOLD = 10; yo"!C?82=
]ag^~8bG @
/* F]`_akE
* (non-Javadoc) QF9$SCmv
* :A]CD(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qe1WT T]:I
*/ s f<NC>-
public void sort(int[] data) { Cc!LJ
int[] temp=new int[data.length]; ?/^x)Nm
mergeSort(data,temp,0,data.length-1); C+Pw
} ?4MZT5 .
F)hUT@
private void mergeSort(int[] data, int[] temp, int l, int r) { 8Hh=Sp^
int i, j, k; `NARJ9M
int mid = (l + r) / 2; =1Tn~)^O
if (l == r) wb/@g=`d
return; eAbp5}B
if ((mid - l) >= THRESHOLD) }tUr V
mergeSort(data, temp, l, mid); wGAeOD
else m$bDWxm#e
insertSort(data, l, mid - l + 1); )>8k8E
if ((r - mid) > THRESHOLD) ,kw:g&A
mergeSort(data, temp, mid + 1, r); C'xWRSDO
else tY6QhhuS:
insertSort(data, mid + 1, r - mid); 5u&hp
"y$s`n4Mj
for (i = l; i <= mid; i++) { d m$iiRY
temp = data; [rtMx8T
} k|[86<&[
for (j = 1; j <= r - mid; j++) { geEETb}+y
temp[r - j + 1] = data[j + mid]; >'2=3L^Q
} 53)*i\9&
int a = temp[l]; Lo^gg#o
int b = temp[r]; <%EjrjdvL+
for (i = l, j = r, k = l; k <= r; k++) { \4roM1&[
if (a < b) { u^]Z{K_B
data[k] = temp[i++]; I=}pT50~9
a = temp; Q[UYNQ0w
} else { 8PwPI%Pb
data[k] = temp[j--]; 2)47$eu
b = temp[j]; o&U/e\zy
} Cy'! >
} G.sf>.[
} RL~]mI!U
6SN$El 0|G
/** :dj=kuUTbu
* @param data gtw?u b
* @param l gaxxB]8
* @param i &<oDl_^
*/ #i0f}&
private void insertSort(int[] data, int start, int len) { QsH?qI&2jp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eCXw8
} :}p<Hq 8Z
} 8I,/ysT:
} NGOyd1$7N
} j`ybzG^
tboc7Hor4
堆排序： =y WHm
f`"@7-N
package org.rut.util.algorithm.support; n`2LGc[rP
`]4bH,%~
import org.rut.util.algorithm.SortUtil; 7Hzv-s
7=[/J*-m
/** R?H[{AX
* @author treeroot &(YNz9L
* @since 2006-2-2 5Int,SX
* @version 1.0 &)#bdt[
*/ 7/GL@H
public class HeapSort implements SortUtil.Sort{ vK,.P:n
O t1:z:Pl
/* (non-Javadoc) zTS#o#`!\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6`U]%qx_I
*/ vDp|9VY?
public void sort(int[] data) { -Gmg&yQ9
MaxHeap h=new MaxHeap(); n>i}O!agg
h.init(data); e.?;mD
for(int i=0;i h.remove(); f~Q]"I8w
System.arraycopy(h.queue,1,data,0,data.length); #5}v?
} /E<:=DD<
_"c:Z!L
private static class MaxHeap{ ".Sa[A;~
1]]#HTwX
void init(int[] data){ m. "T3K
this.queue=new int[data.length+1]; El4SL'E@
for(int i=0;i queue[++size]=data; BhC>G2 ^7
fixUp(size); P1A5Qq
} e]@R'oM?#`
} w^wh|'u^_@
J^)=8cy
private int size=0; "=vH,_"Ql
^.~m4t`U
private int[] queue; ;P!x/Ct
r>3y87
public int get() { ]gG&X3jaKq
return queue[1]; J!@`tR-
} :zLeS-
W:* {7qJ
public void remove() { 66%4p%#b4
SortUtil.swap(queue,1,size--); \1mTKw)S
fixDown(1); HA0Rv#p
} *zTEK:+_
file://fixdown SWPb=[WEz
private void fixDown(int k) { VAet!H+]
int j; yy#4DYht
while ((j = k << 1) <= size) { FCA]zR1
if (j < size %26amp;%26amp; queue[j] j++; 2}jC%jR2
if (queue[k]>queue[j]) file://不用交换 xI(Y}>
break; Yo;Mexo!
SortUtil.swap(queue,j,k); l~c# X3E
k = j; pIP^/H
} N@G~+GCxL
} (7J (.EG2e
private void fixUp(int k) { G*\U'w4w|*
while (k > 1) { /j:fc?yv
int j = k >> 1; *nc9u"
if (queue[j]>queue[k]) $KMxq=
break; 6h3TU,$r
SortUtil.swap(queue,j,k); fs;pX/:FR
k = j; 4NxI:d$&*
} %% A==_b
} *e}1KcJ
atmTI`i
} *>8Y/3Y\B
=%ZR0cWPoI
} 9G=HG={
D;QV`Z%I
SortUtil： v!77dj 6I
85 <%L:EC
package org.rut.util.algorithm; /Ym!%11`
|+r5D4]e
import org.rut.util.algorithm.support.BubbleSort; -5TMV#i {
import org.rut.util.algorithm.support.HeapSort; T }^2IJ]
import org.rut.util.algorithm.support.ImprovedMergeSort; TU}./b@F
import org.rut.util.algorithm.support.ImprovedQuickSort; NQqq\h
import org.rut.util.algorithm.support.InsertSort; 0FG|s#Ig
import org.rut.util.algorithm.support.MergeSort; Fooa~C"
import org.rut.util.algorithm.support.QuickSort; h(MS>=
import org.rut.util.algorithm.support.SelectionSort; MR-cOPn
import org.rut.util.algorithm.support.ShellSort; @1^:V-=
IM$I=5ye
/** C3GI?|b
* @author treeroot +3%i7
* @since 2006-2-2 )*T<s
* @version 1.0 /o]j
*/ Jl|^
public class SortUtil { ruK,Z,3Q
public final static int INSERT = 1; fgEMn;
public final static int BUBBLE = 2; ;/|3U7{c
public final static int SELECTION = 3; `R{ ZED l'
public final static int SHELL = 4; 7$jO3J
public final static int QUICK = 5; RuuXDuu:VL
public final static int IMPROVED_QUICK = 6; Zg~6
public final static int MERGE = 7; F,>-+~L=
public final static int IMPROVED_MERGE = 8; tDwj~{a~
public final static int HEAP = 9; A.@Af+
' &j]~m
public static void sort(int[] data) { >S=,ype~G
sort(data, IMPROVED_QUICK); 9d1 Gu"
} 7UA|G2Zr
private static String[] name={ j3yz"-53e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZK8I f?SD
}; Cv;\cI"&
ga+Z6|t
private static Sort[] impl=new Sort[]{ k:k!4
new InsertSort(), )'Yoii{dSU
new BubbleSort(), IWD21lS
new SelectionSort(), Fl;!'1
new ShellSort(), FST}:*dOe5
new QuickSort(), 9a;8^?Ld%S
new ImprovedQuickSort(), &nX,)"
new MergeSort(), =as\Tp#d
new ImprovedMergeSort(), bhg OLh#
new HeapSort() Xsit4Ma
}; gP 6`q
c0M>CaKD
public static String toString(int algorithm){ rm nfyn
return name[algorithm-1]; z(dX<
} Zk#?.z}
Z4aK
public static void sort(int[] data, int algorithm) { ;?'=*+'>
impl[algorithm-1].sort(data); jFThW N
} iz pFl@WS
]53'\TH
public static interface Sort { ajMI7j^G
public void sort(int[] data); g7),si*
} 6K 6uB ~
\~ql_X;3
public static void swap(int[] data, int i, int j) { 4bZ +nQgLu
int temp = data; h`HdM58CQ
data = data[j]; xPJ kadu
data[j] = temp; LJII7<k
} |`i.8
} 'YUx&FcM