[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; "@)lH
} :\bfGSD/gd
int i1=l; >qpqQ; bm
int i2=mid+1; 8K^f:)Qw
for(int cur=l;cur<=r;cur++){ ]]/lC
if(i1==mid+1) iRs V#s
data[cur]=temp[i2++]; afUTAP@
else if(i2>r) <\ETPL,<
data[cur]=temp[i1++]; I.a0[E/,
else if(temp[i1] data[cur]=temp[i1++]; O9e.=l
else i|4_m
data[cur]=temp[i2++]; 9wMEvX70
} GoD ?KC
} jsZY{s=
4>k I^
} :o$@F-$k
BKZ v9
改进后的归并排序: -l JYr/MSL
)!a$#"'
package org.rut.util.algorithm.support; QnU0"_-
kwF]TO S
import org.rut.util.algorithm.SortUtil; Lzz)n%y5
f~*K {7
/** +6376$dC
* @author treeroot T.2ZBG~|[
* @since 2006-2-2 `p1DaV
* @version 1.0 9A+M|;O
*/ n^Vxi;F
public class ImprovedMergeSort implements SortUtil.Sort { L=m:/qQL
o&,Y<$!:VH
private static final int THRESHOLD = 10; }P.K2ku
P&\X`ZUA
/* ^jOCenE3
* (non-Javadoc) PY-+Bf
* 8Z!*[c>K-?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @>:i-5
*/ VF=Z`
public void sort(int[] data) { T<M?PlED
int[] temp=new int[data.length]; <A{y($
mergeSort(data,temp,0,data.length-1); a[i>;0
} Y-]YDXrPQ
>HIt}Zh
private void mergeSort(int[] data, int[] temp, int l, int r) { J|q^+K
int i, j, k; @?d?e+B
int mid = (l + r) / 2; [rot
if (l == r) _NT[ ~M_Q
return; RM#fX^)=
if ((mid - l) >= THRESHOLD) ^Xa*lR 3
mergeSort(data, temp, l, mid); ^r4|{
else 0[i}rC9&
insertSort(data, l, mid - l + 1); .HCaXFW
if ((r - mid) > THRESHOLD) fCr\u6Tb
mergeSort(data, temp, mid + 1, r); A!4VjE>
else /.2qWQH
insertSort(data, mid + 1, r - mid); _ .!aBy%xf
z{' 6f@]
for (i = l; i <= mid; i++) { b"&E,=L
temp = data; (Z 8,e
} shNE~TA
for (j = 1; j <= r - mid; j++) { kXMP=j8
temp[r - j + 1] = data[j + mid]; Br&^09S
} *:[b'D!A
int a = temp[l]; ,m3":{G:t.
int b = temp[r]; w#<p^CS
for (i = l, j = r, k = l; k <= r; k++) { UFIjW[h
if (a < b) { Bi XTC$Oi
data[k] = temp[i++]; =R2l3-HA=
a = temp; ]\`w1'*
} else { %}ixgs7*c0
data[k] = temp[j--]; dxntGH< O
b = temp[j]; S QSA%B$<
} r*]uR /Z$
} DUhT>,~]
} >HX)MwAP
ivD^HhG
/** j<@fT ewZ
* @param data T1bFxim#b
* @param l G\):2Qz!|
* @param i l<Lz{)OR
*/ }|,EU!nDi
private void insertSort(int[] data, int start, int len) { k5C>_( A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t%:G|n Sz
} 4Lw'v:(
} LjCykk
} 38"cbHE3
} mgxz1d
TRo4I{L6S
堆排序： C?S~L5a#oC
n-W?Z'H{r
package org.rut.util.algorithm.support; RpjSTV8Tkm
"s${!A)
import org.rut.util.algorithm.SortUtil; wCC-Y kA
AsD1-$
/** _En]@xK3&
* @author treeroot Ae.]F)w_\
* @since 2006-2-2 6z PV'~q
* @version 1.0 W!y)Ho
*/ V54q"kP,@.
public class HeapSort implements SortUtil.Sort{ 3JTU^-S<
A xRl*B
/* (non-Javadoc) FDl,Ey^r/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O-?z' @5cI
*/ 3b,=
public void sort(int[] data) { JtThkh'-"
MaxHeap h=new MaxHeap(); 6NU8HJp
h.init(data); e W9)@nVJ
for(int i=0;i h.remove(); dy'X<o^?W
System.arraycopy(h.queue,1,data,0,data.length); 1`nc8qC
} >c&4_?d&,A
-aC!0O y`
private static class MaxHeap{ kqQphKkL
-`,~9y;tx
void init(int[] data){ kbD*=d}3{
this.queue=new int[data.length+1]; ,>:XE@xcp
for(int i=0;i queue[++size]=data; wVlSjk
fixUp(size); nl.~^CP
} 0c%@e2(N
} *;>V2!N=U
zojuH8
private int size=0; Wdei`u[
~+7ad$
private int[] queue; cC7"J\+r*
]JkpRaP$
public int get() { h9,wiT
return queue[1]; G~Sy&XJuq
} N02zPC 8
p_D on3
public void remove() { FSI]k:
SortUtil.swap(queue,1,size--); a*pXrp@
fixDown(1); 2&zn^\%"
} NN31?wt
file://fixdown n0Qh9*h
private void fixDown(int k) { Lf$Q %eM0
int j; p,M3#^ q
while ((j = k << 1) <= size) { xCDA1y;j
if (j < size %26amp;%26amp; queue[j] j++; g~bf!
if (queue[k]>queue[j]) file://不用交换 'LtgA|c=
break; D2hAlV)i(
SortUtil.swap(queue,j,k); n"K {uj))
k = j; c,g]0S?gu
} *K0j5dx
} ?NL&x
private void fixUp(int k) { [R@q]S/
while (k > 1) { (ffOu#RQ3
int j = k >> 1; < -@,
if (queue[j]>queue[k]) Vq)|gF[6i
break; ZmYa.4'L
SortUtil.swap(queue,j,k); -KJ}.q>upq
k = j; rFt,36#
} u"Hd55"&
} )%H5iSNG$P
a[d{>Fb.
} : .FfE
&VZmP5Gv
} 7DC0W|Fe
*`QdkVER
SortUtil： ],fwZd[t
Fw_bY/WN{
package org.rut.util.algorithm; 4cVs(`g^
D x>1y
import org.rut.util.algorithm.support.BubbleSort; >? A `C!i
import org.rut.util.algorithm.support.HeapSort; [][:/~q!
import org.rut.util.algorithm.support.ImprovedMergeSort; ?Uy*6YS
import org.rut.util.algorithm.support.ImprovedQuickSort; ^8f|clw"
import org.rut.util.algorithm.support.InsertSort; ; ei<Q =[
import org.rut.util.algorithm.support.MergeSort; NdXy%Q
import org.rut.util.algorithm.support.QuickSort; FRJ:ym=E
import org.rut.util.algorithm.support.SelectionSort; %gne%9nn
import org.rut.util.algorithm.support.ShellSort; q!9v}R3(
f@xfb ie!
/** 2A18hP`^
* @author treeroot {TxVRpiP{Z
* @since 2006-2-2 !Sy'Z6%f
* @version 1.0 BF1O|Q|d6
*/ v[3hnLN%
public class SortUtil { +(h6{e%)
public final static int INSERT = 1; Kj1#R
public final static int BUBBLE = 2; T0]%(F/8
public final static int SELECTION = 3; Z+h70,|
public final static int SHELL = 4; @D=2Er\
public final static int QUICK = 5; E't G5,/m
public final static int IMPROVED_QUICK = 6; {p lmFV
public final static int MERGE = 7; (k)gZD9~{?
public final static int IMPROVED_MERGE = 8; (J;zkb
public final static int HEAP = 9; fE7a]REK
2Ws/0c
public static void sort(int[] data) { pTV@nP
sort(data, IMPROVED_QUICK); >-@{vyoOy
} as\K(c9
private static String[] name={ .V)2Tz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _%p9B#X<>
}; PuoJw~^h
h C`p<jp/
private static Sort[] impl=new Sort[]{ 4Uy>#IL
new InsertSort(), 4[V6so0
new BubbleSort(), 7J!d3j2TR
new SelectionSort(), E#X!*q&
new ShellSort(), t-|=weNy
new QuickSort(), Vx4pP$S
new ImprovedQuickSort(), eiSO7cGy
new MergeSort(), #uw*8&%0
new ImprovedMergeSort(), A)p!w aG
new HeapSort() y7G|P~td
}; E_I6
+7vh__
public static String toString(int algorithm){ 90(oV&
return name[algorithm-1]; AJ1$$c
} XxU}|jTO#
{ZYCnS&?CL
public static void sort(int[] data, int algorithm) { B>nd9Z '
impl[algorithm-1].sort(data); $bC!T
} !I+u/f?TO7
JI; i1@|b
public static interface Sort { 8lb `
public void sort(int[] data); 4a-F4j'
} eOmxA<h
Vm8_ !$F
public static void swap(int[] data, int i, int j) { yaGVY*M0
int temp = data; 3Eux-C!t
data = data[j]; &aht K}u
data[j] = temp; %_LHD|<
} J#;m)5[ a%
} "@|V.d@