[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; K-)_1
} q>%KIBh(
int i1=l; Yp./3b VO
int i2=mid+1; n%3rv?m7
for(int cur=l;cur<=r;cur++){ /P5w}n
if(i1==mid+1) a =*(>=
data[cur]=temp[i2++]; NUEy0pLw
else if(i2>r) NM/?jF@j*
data[cur]=temp[i1++]; 5Qo\0YH
else if(temp[i1] data[cur]=temp[i1++]; PLKp<kg
else WHqp7NPl
data[cur]=temp[i2++]; s,"<+80%
} ,4jkTQ*@2
} wZh&w<l'
@xmO\
} ['sj'3cW-
iT%aAVs
改进后的归并排序: Va\dMv-b
qWGnIPk
package org.rut.util.algorithm.support; n(/(F`
R(kr@hM
import org.rut.util.algorithm.SortUtil; _,=A\C_b@
@~U: |h
/** 0V"r$7(}
* @author treeroot >1,.4)k%K
* @since 2006-2-2 XN5EZ#
* @version 1.0 8*H-</ =
*/ CK 3]]{
public class ImprovedMergeSort implements SortUtil.Sort { EJ.oq*W!*J
hewX)
private static final int THRESHOLD = 10; x %L2eXL
k8F<j)"
/* I0(BKMp&
* (non-Javadoc) =_\5h=`Yx
* n%"q>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >:Na^+c
*/ Y]P';C_eP
public void sort(int[] data) { efy65+~GG
int[] temp=new int[data.length]; >zFe)
mergeSort(data,temp,0,data.length-1); `g<@F^x5
} 7u6o~(
n&D<l '4
private void mergeSort(int[] data, int[] temp, int l, int r) { Z%y>q|:
int i, j, k; 2^bq4c4J
int mid = (l + r) / 2; _Buwz_[&
if (l == r) \acJ9N
return; U,LW(wueT
if ((mid - l) >= THRESHOLD) j5|_SQOmt
mergeSort(data, temp, l, mid); LUl6^JU
else :@rE&
insertSort(data, l, mid - l + 1); BDNn~aU#m
if ((r - mid) > THRESHOLD) P_B#
mergeSort(data, temp, mid + 1, r); -/ ;y*mP
else zu5'Ex`gQa
insertSort(data, mid + 1, r - mid); h +.8Rl
Jor>YB`X
for (i = l; i <= mid; i++) { gYA|JFi
temp = data; &8_]omuNV
} ]iRE^o6
for (j = 1; j <= r - mid; j++) { *&q\)\(3w
temp[r - j + 1] = data[j + mid]; WM.JoQ
} S 3Tp__
int a = temp[l]; 9JBPE
int b = temp[r]; =MEv{9_
for (i = l, j = r, k = l; k <= r; k++) { >N@tInE
if (a < b) { {UX?z?0T
data[k] = temp[i++]; /1F%w8Iqh
a = temp; %I9{)'+@x
} else { X|q&0W=
data[k] = temp[j--]; n1 =B
b = temp[j]; q&Y'zyHLP
} gS_)(
} ;n%SjQ'%
} 8>x!n/z)
'3 w=D )
/** u=z$**M^
* @param data :6S!1roi
* @param l 1 !bODd
* @param i B]L5K~d
*/ U&yXs'3a&
private void insertSort(int[] data, int start, int len) { .+MJ' bW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QG*=N {%5
} 'A;G[(SYy
} `uM:>
} &PaqqU.
} hEi]-N\X
'iA#lKG
堆排序： GwQW I]
k__iJsk
package org.rut.util.algorithm.support; $,v '>
Zk4Hs%n
import org.rut.util.algorithm.SortUtil; GR@!mf
+~?ze,Di
/** X,n4_=f
* @author treeroot &lbxmUeU
* @since 2006-2-2 T6h-E^Z
* @version 1.0 ."&,_F
*/ id<i|
public class HeapSort implements SortUtil.Sort{ SNV~;@(h
)Fx"S.Ok
/* (non-Javadoc) 9]fhH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M(|Qvh{Q6
*/ C,~wmS )@
public void sort(int[] data) { 1j0OV9-|
MaxHeap h=new MaxHeap(); \ZX5dFu0
h.init(data); T]-yTsto
for(int i=0;i h.remove(); i]J*lM7'
System.arraycopy(h.queue,1,data,0,data.length); g}"`@H(9r3
} xI}o8GKQq
k"D6Vyy`
private static class MaxHeap{ XTEC0s"F
I=o[\?u*_
void init(int[] data){ (|)`~z
this.queue=new int[data.length+1]; c[\ :^w^I6
for(int i=0;i queue[++size]=data; 4YDK`:4I~
fixUp(size); ~XN--4%Q
} ;*1bTdB5a
} uPKq<hBI
<_$]!Z6UR
private int size=0; ?j;e/r.
(MhC83|?
private int[] queue; pd{W(M78g
K]ob>wPf
public int get() { nwswy]e8/
return queue[1]; 9pUvw_9MY
} A]ZCQ49
%E#OUo[y/
public void remove() { #<0Yx9Jh.
SortUtil.swap(queue,1,size--); b~X^vXIv%%
fixDown(1); e8g"QDc
} Lh3>xZy"-z
file://fixdown E .^5N~.
private void fixDown(int k) { f2Zi.?``H
int j; 28FC@&'H
while ((j = k << 1) <= size) { E}AOtY5a
if (j < size %26amp;%26amp; queue[j] j++; J@D5C4>i
if (queue[k]>queue[j]) file://不用交换 g?`g+:nug
break; .w2QiJ
SortUtil.swap(queue,j,k); i)9}+M5
k = j; ;,P-2\V/
} arJ4^ d
} :MeshzWK
private void fixUp(int k) { {6{y"8
while (k > 1) { Y$xO&\&)
int j = k >> 1; jy@vz,/:%5
if (queue[j]>queue[k]) D`p&`]k3v
break; ?~~sOf AP
SortUtil.swap(queue,j,k); !<r+h,C
k = j; 8 2qf7`
} b~DtaGh
} -YM#.lQ
vzV,} S*c
} {Hncm
Y.` {]rC
} 5v"r>q[ X
@(>XSTh9
SortUtil： !`5[(lm
pRI<L'
package org.rut.util.algorithm; @P=St\;VP
Yhdt"@;..
import org.rut.util.algorithm.support.BubbleSort; '=MaO@ @
import org.rut.util.algorithm.support.HeapSort; fxfzi{}uj
import org.rut.util.algorithm.support.ImprovedMergeSort; r@C2zF7
import org.rut.util.algorithm.support.ImprovedQuickSort; P^m+SAAB
import org.rut.util.algorithm.support.InsertSort; z'@j9vT
import org.rut.util.algorithm.support.MergeSort; n8<o*f&&9>
import org.rut.util.algorithm.support.QuickSort; dFY]~_P472
import org.rut.util.algorithm.support.SelectionSort; n\d`Fk
import org.rut.util.algorithm.support.ShellSort; i`[5%6\"&
[MSLVTR
/** 9$,x^Qx
* @author treeroot bwh7.lDAl
* @since 2006-2-2 kN3T/96
* @version 1.0 tP; &$y.8
*/ )|;*[S4
public class SortUtil { yMdEH-?/
public final static int INSERT = 1; `$og]Dn;
public final static int BUBBLE = 2; zNSix!F
public final static int SELECTION = 3; 5 o:VixZf
public final static int SHELL = 4; XL[/)lX{
public final static int QUICK = 5; (vte8uQe
public final static int IMPROVED_QUICK = 6; l;i,V;@t
public final static int MERGE = 7; !0ly1T 9
public final static int IMPROVED_MERGE = 8; Y.I-hl1<r
public final static int HEAP = 9; zJ{?'kp
6o@}k9AN
public static void sort(int[] data) { {\-rZb==F2
sort(data, IMPROVED_QUICK); !NWz
} B;9"=0
private static String[] name={ H /Idc,*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qz7:jq3N-{
}; JFaxxW
[NcS[*qp
private static Sort[] impl=new Sort[]{ gfE<XrG
new InsertSort(), (;utiupW
new BubbleSort(), d,=Kv
new SelectionSort(), ""Ul6hRgv
new ShellSort(), p:M#F:
new QuickSort(), <hi@$.u_Q^
new ImprovedQuickSort(), eUQ.,mP
new MergeSort(), !:e|M|T'I*
new ImprovedMergeSort(), Hw"ik6
new HeapSort() "|W .o=R
}; )6|7L)Dk
`(A6uakd
public static String toString(int algorithm){ =PHl|^
return name[algorithm-1]; 3/IQ]8g"
} $ tf;\R
W-wy<<~f
public static void sort(int[] data, int algorithm) { g*b 4N_
impl[algorithm-1].sort(data); 9tZ)#@\
} ?]%JQ]Gf*
xsK{nM6g
public static interface Sort { %bf+Y7m
public void sort(int[] data); TJ(PTB;
} _'&N01
'!`%!Xg
public static void swap(int[] data, int i, int j) { j0J}d _
int temp = data; ~82[pY
data = data[j]; o?\)!_Z|
data[j] = temp; Ore$yI}!m
} t}-[^|)7
} ]D^dQ%{