[JAVA]用Java实现的各种排序

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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; ~bm2_/RL
} &4$43\(D
int i1=l; (? #U&
int i2=mid+1; Ok.DSOT
for(int cur=l;cur<=r;cur++){ 9.w3VF_C
if(i1==mid+1) i|! 9o:
data[cur]=temp[i2++]; sMe~C>RD
else if(i2>r) "%@=?X8
data[cur]=temp[i1++]; GlkAJe]
else if(temp[i1] data[cur]=temp[i1++]; pU)3*9?cIl
else !j\&BAxTEk
data[cur]=temp[i2++]; {bsr 9.k(
} H_nOE(i<z
} sp]y!zb"5
%X-&yGY
} SoON@h/
/3:IE%o
改进后的归并排序: YdL1(|EdM
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package org.rut.util.algorithm.support; DD{@lM\vc
1:l&&/Wy
import org.rut.util.algorithm.SortUtil; dUVTQ18F
4!b'%)
/** VBj;2~Xj4h
* @author treeroot K&~#@I;
* @since 2006-2-2 \#*;H|U.x
* @version 1.0 5O;oo@A:[
*/ UC2OYZb
public class ImprovedMergeSort implements SortUtil.Sort { KcyM2hE7
u$`x]K=Zsm
private static final int THRESHOLD = 10; Mm[1Z;H
|\L,r}1N
/* w"Y55EURB
* (non-Javadoc) zyQEz#O
* .6-o?=5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z&/ o
*/ -<^Q2]PE;
public void sort(int[] data) { ve/6-J!5Y.
int[] temp=new int[data.length]; aRb:.\ \zc
mergeSort(data,temp,0,data.length-1); )k<~}wvQ0
} =+#RyV
\\pyu]z
private void mergeSort(int[] data, int[] temp, int l, int r) { MM)/B>cQt
int i, j, k; T%vbD*nt.
int mid = (l + r) / 2; Ku\#Wj|YrP
if (l == r) 9%'HB\A
return; }[R@HmN
if ((mid - l) >= THRESHOLD) t;PnjCD<`
mergeSort(data, temp, l, mid); lkJ#$Ik&
else Vy"^]5
insertSort(data, l, mid - l + 1); !(AFT!
if ((r - mid) > THRESHOLD) MvwJ(3
mergeSort(data, temp, mid + 1, r); K OHH74}_
else 5v-;*
insertSort(data, mid + 1, r - mid); OMC|.[
Kpbber
for (i = l; i <= mid; i++) { @<{#v.T
temp = data; wI]>0geb*
} Vt2=rD4oJk
for (j = 1; j <= r - mid; j++) { AS-t][m#
temp[r - j + 1] = data[j + mid]; XA^:n+Yo
} &WV 9%fI
int a = temp[l]; e:D9;`C
int b = temp[r]; $GKm`I"
for (i = l, j = r, k = l; k <= r; k++) { e<wj5:M|
if (a < b) { +s 0Bt '
data[k] = temp[i++]; u5|e9(J
a = temp; ^i k|l=
} else { ~(E8~)f)
data[k] = temp[j--]; ">^]^wa08
b = temp[j]; >~8Df61o`
} b4OR`dd*J
} 31\^9w__8
} gMMd=
rKO*A7vE
/** %QZ!Tb
* @param data <"P '"SC
* @param l S;<?nz3
* @param i r:Tb{cA
*/ oD2;Tdk
private void insertSort(int[] data, int start, int len) { \} Szb2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 85~h+Q;
} zt%Fvn4/pF
} cCCplL
} DLM9o3/*J
} 7anpz%
31;T$5v1
堆排序： 1![bu
Q]:%Jj2
package org.rut.util.algorithm.support; D6:J*F&?
2^lT!X@
import org.rut.util.algorithm.SortUtil; ?pY!sG
==r|]~x
/** p&M'DMj+
* @author treeroot #al^Uqd
* @since 2006-2-2 #9"_|d=l
* @version 1.0 nx]b\A
*/ *<j@+Ch
public class HeapSort implements SortUtil.Sort{ N!~NQ-Re'
U.0/r!po
/* (non-Javadoc) v%Q7\X(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }}Uv0g8D
*/ ><7`$2Or
public void sort(int[] data) { z1 px^#
MaxHeap h=new MaxHeap(); m?`Rl6!@8\
h.init(data); a][Z;g
for(int i=0;i h.remove(); :*nBo
System.arraycopy(h.queue,1,data,0,data.length); ,99G2Ev4c
} tAi9mm;k
X*q C:]e
private static class MaxHeap{ R/YL1s
3?(p;
void init(int[] data){ !AHm+C_=Lg
this.queue=new int[data.length+1]; .e+UgCwi
for(int i=0;i queue[++size]=data; jU~%5R
fixUp(size); KYW1<Wcp
} RV(z>XM
} m~B=C>r}t
DNe^_v)]|
private int size=0; Ee&$9 )t
OwaXG/z~
private int[] queue; %%[TM(z
;~;St>?\R\
public int get() { g7F Z -
return queue[1]; dfcG'+RU}
} ijYLf.R<
va;wQ~&
public void remove() { qZ}XjL
SortUtil.swap(queue,1,size--); (Mh\!rMg
fixDown(1); F#wa)XH
} zl?N1>KS
file://fixdown bb/MnhB
private void fixDown(int k) { A'EA!
int j; <`qo*__1
while ((j = k << 1) <= size) { .D`#a
if (j < size %26amp;%26amp; queue[j] j++; %"2B1^o>
if (queue[k]>queue[j]) file://不用交换 lhTbgM
break; _F EF+I
SortUtil.swap(queue,j,k); uSjMqfK
k = j; X_F=;XF/
} e{:qW'%
} S8,06/#
private void fixUp(int k) { ISmnZ@
while (k > 1) { OpE+e4~IF
int j = k >> 1; (?[cDw/{J:
if (queue[j]>queue[k]) sSK$
break; 8msDJ{,X
SortUtil.swap(queue,j,k); t79MBgZ
k = j; Oa .%n9ec
} |VL,\&7rk
} GAlO<Mu
KRe=n3 1
} 0%/(p?]M
^D|c
} jw[`\h}8
k5YDqGn'q
SortUtil： ]Ox.6BKjDP
_K>m9Q2
package org.rut.util.algorithm; <-pbLL9
.Dmvgi]
import org.rut.util.algorithm.support.BubbleSort; Vp$ckr
import org.rut.util.algorithm.support.HeapSort; -(G2@NG
import org.rut.util.algorithm.support.ImprovedMergeSort; !c7Od )]
import org.rut.util.algorithm.support.ImprovedQuickSort; :u0433z:
import org.rut.util.algorithm.support.InsertSort; =I1@O9}+i
import org.rut.util.algorithm.support.MergeSort; jp]JFh;3
import org.rut.util.algorithm.support.QuickSort; AtOB'=ph*
import org.rut.util.algorithm.support.SelectionSort; ez>@'yhK
import org.rut.util.algorithm.support.ShellSort; RT>3\qhZ
!@X#{
/** o_n.,=/cZ
* @author treeroot yw0uF
* @since 2006-2-2 ?`>yl4
* @version 1.0 dp"w=~53
*/ _p.{|7
public class SortUtil { 4E)[<%
public final static int INSERT = 1; M~IiJ9{
public final static int BUBBLE = 2; $7,dKC &
public final static int SELECTION = 3; 3a0C<hW
public final static int SHELL = 4; ;xc
public final static int QUICK = 5; !l|Qyk[
public final static int IMPROVED_QUICK = 6; /[L:ol6;!
public final static int MERGE = 7; .8m)^ET
public final static int IMPROVED_MERGE = 8; :\Z0^{
public final static int HEAP = 9; "e"`Or
Yy}aQF#M
public static void sort(int[] data) { k*Kq:$9"
sort(data, IMPROVED_QUICK); ajAEGD2Zq
} N\?iU8w=
private static String[] name={ Y>+D\|%Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c#DTL/8"DO
}; ln.~>FO
Mx }(w\\T
private static Sort[] impl=new Sort[]{ :<W8uDAs
new InsertSort(), QI-3mqL
new BubbleSort(), S;g~xo
new SelectionSort(), ?cvv!2B]T
new ShellSort(), x1~`Z}LX0
new QuickSort(), r/e&}!
new ImprovedQuickSort(), (2(hl--'n
new MergeSort(), h:;~)={"X
new ImprovedMergeSort(), Ub$$wOsf
new HeapSort() h4#5j'RO
}; `6A"eDa
`3-j%H2R
public static String toString(int algorithm){ dXj.e4,m
return name[algorithm-1]; wK_}`6R/
} CHz(wn
*Pl[a1=o
public static void sort(int[] data, int algorithm) { tv2dyC&a
impl[algorithm-1].sort(data); [Dhc9
} uP$K{ )
]V_9[=%
public static interface Sort { 0)B+:
public void sort(int[] data); wg_Z!(Hr#
} l;2bBx7vW
'a}{s>{O
public static void swap(int[] data, int i, int j) { ;H^!yj5H
int temp = data; 4Zq5
data = data[j]; Xw%z#6l
data[j] = temp; -<sXvn
} T2dpn%I
} O6pjuhMx