[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; 3JF" O+@
} g- INhzMu
int i1=l; 6\QsK96_
int i2=mid+1; B6!ni@$M8X
for(int cur=l;cur<=r;cur++){ `Q>qmf_Fi
if(i1==mid+1) h4~VzCR4x\
data[cur]=temp[i2++]; Z?eedVV@
else if(i2>r) I]91{dq
data[cur]=temp[i1++]; a3 t||@v!
else if(temp[i1] data[cur]=temp[i1++]; )Tn(!.
else M=5hp&=
data[cur]=temp[i2++]; gm: xtN
} `n`HwDo;i
} ,!^;<UR:
E@Yq2FBpnn
} q-+_Y `_\
]^QO^{Sz
改进后的归并排序: VY!A]S"
IfCa6g<&(
package org.rut.util.algorithm.support; Z/e[$xT <
`TDS4Y
import org.rut.util.algorithm.SortUtil; R]S!PSoL
-x>2Wb~%
/** CL!s #w1I\
* @author treeroot 0(A&m ,
* @since 2006-2-2 S\2@~*{-8
* @version 1.0 Dv=pX.Z+
*/ qcBamf
public class ImprovedMergeSort implements SortUtil.Sort { *OY Nx4k
+3R/g@n
private static final int THRESHOLD = 10; W)odaab7
u&o<>d;)
/* YE-}1&8
* (non-Javadoc) (/_w23rr
* )u=a+T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /jn0Xh
*/ #b;TjnC5{$
public void sort(int[] data) { i%r+/D)KvG
int[] temp=new int[data.length]; 5^{).fig
mergeSort(data,temp,0,data.length-1); %hRH80W|
} ev5m(wR
$ 3.Y2&$T
private void mergeSort(int[] data, int[] temp, int l, int r) { Y0o{@)Y:
int i, j, k; }};AV)}J
int mid = (l + r) / 2; R, UYwI
if (l == r) ebf/cCh
return; F||oSJrI
if ((mid - l) >= THRESHOLD) c&#B1NN<
mergeSort(data, temp, l, mid); -&LF`V&3w
else uNvdlY]
insertSort(data, l, mid - l + 1); .JWN\\
if ((r - mid) > THRESHOLD) R& HkWe
mergeSort(data, temp, mid + 1, r); }Q;^C
else x 4`RKv2m
insertSort(data, mid + 1, r - mid); Fma#`{va
/t _QA
for (i = l; i <= mid; i++) { \~>7n'd ]
temp = data; Y\9zjewc
} ?Pt*4NaT;
for (j = 1; j <= r - mid; j++) { (ZD~Q_O-
temp[r - j + 1] = data[j + mid]; %/%TR@/
} p3cb_
int a = temp[l]; ]P4?jKI
int b = temp[r]; 2-@z-XKn
for (i = l, j = r, k = l; k <= r; k++) { F@-8J?Hl:
if (a < b) { VVi3g
data[k] = temp[i++]; :io[9B [
a = temp; >q1rdq
} else { Y]"lcr}
data[k] = temp[j--]; #>">fs]
b = temp[j]; kOv37c'
} +)*oPSQ5
} k6|/ik9C
} I=4G+h5p
cg}lF9;d
/** |h2=9\:]
* @param data 81S0:=
* @param l L&Pj0K-HT3
* @param i -dH]_
*/ 3\a VZx!
private void insertSort(int[] data, int start, int len) { ?p &Xf>K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J L2g!n= K
} 'LLpP#(
} $8NM[R.8^4
} `Wp& 'X
} #} `pj}tQ
n6#z{,W<3
堆排序： |DXi~
:}ZY*ind
package org.rut.util.algorithm.support; ~Z$Ro/;l
_16r8r$V
import org.rut.util.algorithm.SortUtil; D#d \1g
ZE6W"pbjU
/** %ERR^
* @author treeroot O7zj8
* @since 2006-2-2 ?q}:ojrs1
* @version 1.0 }_9yemP
*/ vH>s2\V"
public class HeapSort implements SortUtil.Sort{ )*9,H|2nS
p 8lm1;
/* (non-Javadoc) .;%`I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gs(;&fw
*/ /*m6-DC
public void sort(int[] data) { fI-f Gx
MaxHeap h=new MaxHeap(); Eyg F,>.4
h.init(data); C&RZdh,$
for(int i=0;i h.remove(); pw=o}-P{
System.arraycopy(h.queue,1,data,0,data.length); O`0\f8/.?
} o(oD8Ni
Md>9Daa~
private static class MaxHeap{ 4-W~1
Ew&|!d
void init(int[] data){ OT}P0 ~4s
this.queue=new int[data.length+1]; ~Da-|FKa>
for(int i=0;i queue[++size]=data; z/f0.RJ
fixUp(size); L [X"N
} fWl #CI\]
} 3F{R$M}
(Iv*sd *
private int size=0; wo\O0?d3{
E#c9n%E\sz
private int[] queue; D]+@pKb
NsL!AAN[V
public int get() { eVGW4b
return queue[1]; Poxoc-s
} O\}w&BE:h
g ~>nT>6
public void remove() { XiAflO
SortUtil.swap(queue,1,size--); lO8GnkLE
fixDown(1); :hDv^D?3
} 71,GrUV:
file://fixdown rnM C[
private void fixDown(int k) { O5A]{W
int j; U]O>DM^'
while ((j = k << 1) <= size) { rh6 e
if (j < size %26amp;%26amp; queue[j] j++; gmtS3,
if (queue[k]>queue[j]) file://不用交换 $~'G<YYF4
break; Ej$oRo{IG
SortUtil.swap(queue,j,k); !+n'0{
k = j; >,c'Z<TM
} M~g@y$
} {R7m qzt
private void fixUp(int k) { N'I9J?e Q
while (k > 1) { :qtg`zM/4
int j = k >> 1; fs8C ^Ik>~
if (queue[j]>queue[k]) "VA'W/yv!
break; Q@cYHFi~+
SortUtil.swap(queue,j,k); ho}G]y
k = j; ez[$;>
} |5\: E}1
} *):s**BJ$
DN|+d{^lN
} 1A N)%
r ['zp=9
} /F}dC/W
@Qd5a(5WM
SortUtil： s"X0Jx}
,sltB3f
package org.rut.util.algorithm; P$"s*otr
&IkHP/
import org.rut.util.algorithm.support.BubbleSort; .Iv`B:4
import org.rut.util.algorithm.support.HeapSort; $QaEU="Z
import org.rut.util.algorithm.support.ImprovedMergeSort; S vW{1
import org.rut.util.algorithm.support.ImprovedQuickSort; 8FQNeQr
import org.rut.util.algorithm.support.InsertSort; xhncQhf\
import org.rut.util.algorithm.support.MergeSort; FF#?x@N:
import org.rut.util.algorithm.support.QuickSort; g\@zQ^O?
import org.rut.util.algorithm.support.SelectionSort; *N%)+-
import org.rut.util.algorithm.support.ShellSort; 2Kw i4R
r,wC5%&Za
/** Q57Z~EsF
* @author treeroot ?7w7Y;FuR
* @since 2006-2-2 $2$jV1s
* @version 1.0 6bBNC2K$-
*/ U sV?}
public class SortUtil { ky[^uQ>0
public final static int INSERT = 1; &[$t%:`
public final static int BUBBLE = 2; dSbz$Fct
public final static int SELECTION = 3; sUpSXG-W/@
public final static int SHELL = 4; 6x@4gPy[
public final static int QUICK = 5; ^fti<Lw5
public final static int IMPROVED_QUICK = 6; 6tup^Rlo;$
public final static int MERGE = 7; n/+G^:~_
public final static int IMPROVED_MERGE = 8; LEY k
public final static int HEAP = 9; k<%y+v
(^^}Ke{J
public static void sort(int[] data) { oC(.u?
sort(data, IMPROVED_QUICK); RHuc#b0
} Enqs|fkbN
private static String[] name={ #6nuiSF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {$v>3FG
}; ?cgb3^R'
29f4[V X
private static Sort[] impl=new Sort[]{ /^,/o
new InsertSort(), |/!RN[<
new BubbleSort(), 7'R7J"sY`|
new SelectionSort(), gHVD,Jr
new ShellSort(), *NQsD C.J^
new QuickSort(), /(Ryh6M
new ImprovedQuickSort(), @0iXqM#jH
new MergeSort(), u(4o#m
new ImprovedMergeSort(), V#V<Kz
new HeapSort() c~ Q5A
}; I3dUI~}u
je=XZ's,i~
public static String toString(int algorithm){ NzbHg p
return name[algorithm-1]; MDfC%2Q
} u{|^5%)
mlbSs_LT^
public static void sort(int[] data, int algorithm) { d&%}u1 .
impl[algorithm-1].sort(data); 0Yfz?:e
} jYsg'Rl
u7bji>j
public static interface Sort { nLnzl
public void sort(int[] data); '#CYw=S+
} PfJfa/#pA
TU?$yNE
public static void swap(int[] data, int i, int j) { )Z63 cr/
int temp = data; els71t -
data = data[j]; DcEGIaW
data[j] = temp; )4 'yI*
} _6C,w`[[6
} T_~xDQ`v