[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; gdCU1D\
} <,rjU*"
int i1=l; {b/AOR o
int i2=mid+1; Z"!C
for(int cur=l;cur<=r;cur++){ 6Mk@,\1
if(i1==mid+1) `$@1NL7>
data[cur]=temp[i2++]; /~ V"v"7E
else if(i2>r) #C>pA<YJzK
data[cur]=temp[i1++]; 1uXtBk6
else if(temp[i1] data[cur]=temp[i1++]; TF=S \ Q
else 2N)Ywqvj
data[cur]=temp[i2++]; 'Fc&"(!||
} X% _~9'#%
} 8<.KWr
#v(+3Hp
} iNQk{n
$(zJ
改进后的归并排序: 1Kc*MS
qM1$?U
package org.rut.util.algorithm.support; &LL81u6=S
`+zr PpX
import org.rut.util.algorithm.SortUtil; 2EK\QWo
^x/0*t5};z
/** 8~2A"<{ub
* @author treeroot }JlQQ
* @since 2006-2-2 z>y,}#D?C
* @version 1.0 9w0 ^=
*/ n:<avl@o<
public class ImprovedMergeSort implements SortUtil.Sort { {v`wQM[
CSsb~/Oxu
private static final int THRESHOLD = 10; {5%<@<?)
`b7o
/* 4El{2cfA
* (non-Javadoc) b<5:7C9z
* )Fm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `kj7I{'l%9
*/ Yhlk#>I
public void sort(int[] data) { Rf%ver
int[] temp=new int[data.length]; B:x4H}`vh
mergeSort(data,temp,0,data.length-1); P_ZguNH
} WMUw5h
/VJ@`]jhDf
private void mergeSort(int[] data, int[] temp, int l, int r) { `DA=';>Y
int i, j, k; 9L&AbmIr
int mid = (l + r) / 2; s{iYf :
if (l == r) a[#4Oq/t$
return; f%@Y XGf
if ((mid - l) >= THRESHOLD) t"BpaA^gO
mergeSort(data, temp, l, mid); Hss{Sb(
else %%k[TO
insertSort(data, l, mid - l + 1); np>*O}r*
if ((r - mid) > THRESHOLD) jgGn"}
mergeSort(data, temp, mid + 1, r); 2G'G45Q
else +>:X4A*
insertSort(data, mid + 1, r - mid); ;\&7smE[
T Z>z5YTv
for (i = l; i <= mid; i++) { ZjI^0D8
temp = data; <XLATS8Y
} |Xu7cCh$me
for (j = 1; j <= r - mid; j++) { UNhD
temp[r - j + 1] = data[j + mid]; T:}Ed_m}q
} k2;8~LqF
int a = temp[l]; F%Mlid;1
int b = temp[r]; 9X*q^u
for (i = l, j = r, k = l; k <= r; k++) { ix$+NM<n
if (a < b) { Jp,ohVRNq
data[k] = temp[i++]; `\.n_nM
a = temp; 0`qq"j[6a
} else { sY#K=5R
data[k] = temp[j--]; hnY^Z_v!
b = temp[j]; (8EZ,V:
} E=x\f "Z
} H+: $ 7;
} 5?I]\Tb
Icr'l$PE
/** hi ]+D= S
* @param data MBwp{ET!p
* @param l Fvv6<E
* @param i XSD7~X/:
*/ Xg%zE
private void insertSort(int[] data, int start, int len) { [%h^qJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }5S2v+zE
} 4Fz^[L}[
} )O+9v}2
} 5GRN1Aov<
} nC*/?y*9
Ugs<WVp$
堆排序： > voUh;L
4^i*1&"
package org.rut.util.algorithm.support; P.fgt>v]
f~U|flL^
import org.rut.util.algorithm.SortUtil; ~O|0.)71]
gT+/CVj R
/** X F40;urm
* @author treeroot `kz_q/K
* @since 2006-2-2 !nYAyjf
* @version 1.0 AzQ}}A;TSx
*/ SBF3\
public class HeapSort implements SortUtil.Sort{ yT,UM^'
NCsUC
/* (non-Javadoc) r%a$u%)oD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;x7SY;0*
*/ ![V<vIy
public void sort(int[] data) { +0a',`yc
MaxHeap h=new MaxHeap(); p1D-Q7F
h.init(data); Ri3m438
for(int i=0;i h.remove(); Z?@07Y[|K
System.arraycopy(h.queue,1,data,0,data.length); Q^F-8
} ilHj%h*z
hFjW.~B
private static class MaxHeap{ @Ab<I
v>e4a/
void init(int[] data){ ~KNxAxyVi
this.queue=new int[data.length+1]; E7D^6G&i
for(int i=0;i queue[++size]=data; R.fRQ>rI
fixUp(size); . =+7H`A
} %8-S>'g'
} C[s*Na-
m7@`POI
private int size=0; kOc'@;_O
A} "*`y
private int[] queue; <37vWK1+
SVpe^iQ]1\
public int get() { q'@UZ$2
return queue[1]; Op0 #9W
} z/TZOFaM
M6I1`Lpf
public void remove() { ae<KUThm.
SortUtil.swap(queue,1,size--); 1`uIjXr(
fixDown(1); _Yhpj}KZ
} C/w;g3
file://fixdown mB :lp=c`
private void fixDown(int k) { Jv?e?U
int j; I2Us!W>6-
while ((j = k << 1) <= size) { [_~U<
if (j < size %26amp;%26amp; queue[j] j++; o60wB-y
if (queue[k]>queue[j]) file://不用交换 `BvcIn4do
break; %DN&K
SortUtil.swap(queue,j,k); *83+!DV|
k = j; &O[o;(}mFI
} y^XwJX-f
} 5_O.p3$tV
private void fixUp(int k) { eu4x{NmQ
while (k > 1) { hN}X11
int j = k >> 1; vrbS-Z<S9
if (queue[j]>queue[k]) wx1uduT)
break; emaNmpg
SortUtil.swap(queue,j,k); F0yh7MItV
k = j; J2R<'(
} QO,y/@Ph
} [sad}@R7
IS!+J.2
} RWoiV10
x O)nS _I
} 7}#vANm
78Gvc~j
SortUtil： "pH+YqJ$
eMF%!qUr
package org.rut.util.algorithm; `b2I)xC#
%_u3Np
import org.rut.util.algorithm.support.BubbleSort; x|Ei_hI-
import org.rut.util.algorithm.support.HeapSort; v|"{x&I.
import org.rut.util.algorithm.support.ImprovedMergeSort; =:2V4H(F
import org.rut.util.algorithm.support.ImprovedQuickSort; 3)xV-Y9
import org.rut.util.algorithm.support.InsertSort; -{w&ya4X
import org.rut.util.algorithm.support.MergeSort; k-89(
import org.rut.util.algorithm.support.QuickSort; Uarb [4OZ
import org.rut.util.algorithm.support.SelectionSort; Wm A:"!~M
import org.rut.util.algorithm.support.ShellSort; x88$#N>Q5
l|&nGCW
/** k`&mHSk-
* @author treeroot (;n|>l?*
* @since 2006-2-2 @M,_mX
* @version 1.0 87HVD Di
*/ 15zL,yo
public class SortUtil { mrJQB I+
public final static int INSERT = 1; 5P! ZJ3C
public final static int BUBBLE = 2; m}XI?[!s
public final static int SELECTION = 3; XJlun l)(K
public final static int SHELL = 4; Jd%#eD*k9
public final static int QUICK = 5; W$3p,VTMmB
public final static int IMPROVED_QUICK = 6; ?T^$,1-
public final static int MERGE = 7; 1"'//0 7
public final static int IMPROVED_MERGE = 8; LJiMtqg
public final static int HEAP = 9; D( _aXy
"qF&%&#r'
public static void sort(int[] data) { ^fx9R5E$:
sort(data, IMPROVED_QUICK); E`X+fJx
} EfyF]cYL
private static String[] name={ dRu@5 :BP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NLdUe32A
}; >S~#E,Tg
"#9WF}
private static Sort[] impl=new Sort[]{ WOwIJrP
new InsertSort(), lfGiw^
new BubbleSort(), 3!d|K%J
new SelectionSort(), uM\~*@
new ShellSort(), x=H*"L=
new QuickSort(), c)lK{DC
new ImprovedQuickSort(), p#?1l/f"
new MergeSort(), Zj},VB*T
new ImprovedMergeSort(), X{ Nif G
new HeapSort() "NJ!A
}; 8@r+)2
?>,aq>2O$
public static String toString(int algorithm){ B@F1!8l
return name[algorithm-1]; ~MXPiZG?
} |S4yol
;hg]5r_
public static void sort(int[] data, int algorithm) { jf})"fz-*
impl[algorithm-1].sort(data); s=6w-'; V
} }^QY<Cp|
W=|B3}C?
public static interface Sort { pa+y(!G
public void sort(int[] data); 6 o+zhi;E
} C!.6:Aj
G U!XD!!&
public static void swap(int[] data, int i, int j) { +J^}"dG
int temp = data; }FFW,x
data = data[j]; R sujKh/
data[j] = temp; 7?A}qmv
} ]vlQNd?
} 2V