[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; !w}cKm
} l'0fRQc
int i1=l; ^B`*4
int i2=mid+1; FyV)Nmc%t
for(int cur=l;cur<=r;cur++){ B8sc;Z.
if(i1==mid+1) B%Vz -t
data[cur]=temp[i2++]; -AcVVK&
else if(i2>r) cgevP`*]
data[cur]=temp[i1++]; Y~%9TC
else if(temp[i1] data[cur]=temp[i1++]; _Nmc1azS
else Iurb?
data[cur]=temp[i2++]; 3(n+5~{e
} zEYT,l
} fce~a\y0
"fTW2D74
} AV%t<fDG#
/$NZj"#
改进后的归并排序: u^Sa{Jk=
qe{:9
package org.rut.util.algorithm.support; |}Wm,J
./#F,^F2
import org.rut.util.algorithm.SortUtil; "g=g' W#
s}5,<|DL
/** e0; KmQjG
* @author treeroot SZ'2/#R>
* @since 2006-2-2 WQ>y;fi5/{
* @version 1.0 U3UDA
*/ \2Atm,#4
public class ImprovedMergeSort implements SortUtil.Sort { xYUC|c1Q9
XzF-g*e
private static final int THRESHOLD = 10; OPtFz6
YLVZ]fN=>
/* wq@{85
* (non-Javadoc) K.T.?ug;:
* GjD^\d/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !:<(p
*/ #Z)8,N
public void sort(int[] data) { lk?@ =U~
int[] temp=new int[data.length]; ta'{S=^j
mergeSort(data,temp,0,data.length-1); 'W2B**}
} d=v{3*a_4,
oFC]L1HN&
private void mergeSort(int[] data, int[] temp, int l, int r) { :,'yHVG\
int i, j, k; H;.${u^lhd
int mid = (l + r) / 2; aIXN wnq
if (l == r) HJ]9e
return; U6/$CH<pe
if ((mid - l) >= THRESHOLD) #o/
mergeSort(data, temp, l, mid); Z>)M{25
else g&<3Kl
insertSort(data, l, mid - l + 1); ,VdNP
if ((r - mid) > THRESHOLD) e[ 9
mergeSort(data, temp, mid + 1, r); c>}fy
else (0W)Jd[
insertSort(data, mid + 1, r - mid); 9yrSCDu00
oZCjci-
for (i = l; i <= mid; i++) { xP61^*-2
temp = data; $9%UAqk9
} _q7mYc
for (j = 1; j <= r - mid; j++) { dbG5Cf#K\
temp[r - j + 1] = data[j + mid]; fDU_eyt/Z'
} ;?K>dWf3f
int a = temp[l]; }S,KUH.
int b = temp[r]; 2QN ~E
for (i = l, j = r, k = l; k <= r; k++) { "1iLfQ
if (a < b) { nQ5N\RAZ
data[k] = temp[i++]; z 7 s&7)a
a = temp; J%mtlA
} else { C1ZuDL)e
data[k] = temp[j--]; r]<?,xx[
b = temp[j]; )'3V4Z&
} J'H}e F`
} n&N>$c,T27
} k`u.:C&
ObyF~j}j
/** ["65\GI?
* @param data t 8,VRFV
* @param l 4/J"}S
* @param i lv=rL
*/ =(cfo_B@K
private void insertSort(int[] data, int start, int len) { 7(W"NF{r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); snm1EPj
} u#^~([I
} $FM:8^
} A]_5O8<buW
} G%#M17
8`GN8F
堆排序： ;T,`m^@zf
A/A;'9
package org.rut.util.algorithm.support; +{dJGPoY]p
T_NN.Ol
import org.rut.util.algorithm.SortUtil; |ycN)zuE
H b}(.`
/** T}r}uw`
* @author treeroot 7LrWS83
* @since 2006-2-2 i~sW_f+
* @version 1.0 7~ =r9-&G
*/ |J:kL3g
public class HeapSort implements SortUtil.Sort{ @||GMA+|
d"U'\ID2y
/* (non-Javadoc) ! a!^'2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xwjiNJ Gj
*/ dc=~EG-_rM
public void sort(int[] data) { ^9`S`Bhp
MaxHeap h=new MaxHeap(); 9tBE=L=
h.init(data); (D~NW*,9
for(int i=0;i h.remove(); <Dq7^,}#
System.arraycopy(h.queue,1,data,0,data.length); {wwkbc*
} e.l3xwt>$
t}x^*I$*
private static class MaxHeap{ mVVL[z2+
sOb=+u$$9
void init(int[] data){ m(rd\3d
this.queue=new int[data.length+1]; ^W*3S[-`g
for(int i=0;i queue[++size]=data; trm-&e7q?;
fixUp(size); h4geoC_W2
} G+V?c1Me
} :211T&B%A_
5JggU
private int size=0; <F6LC_
DNmP>~
private int[] queue; (*Fb/
2'T uS?
public int get() { MNWuw;:v
return queue[1]; =Yt)b/0b9
} xI(t!aYp
>yr1wVS
public void remove() { < s1
SortUtil.swap(queue,1,size--); t^5xq8w8
fixDown(1); ;oGpB#[zO
} T'${*NVn
file://fixdown wG}Rh,
private void fixDown(int k) { Q=n2frW(T
int j; Lxqv
while ((j = k << 1) <= size) { K1_#Jhz
if (j < size %26amp;%26amp; queue[j] j++; Kk|4
if (queue[k]>queue[j]) file://不用交换 gBd@4{y6C.
break; W0;MGBfb
SortUtil.swap(queue,j,k); (_Ky'.
k = j; 1!p7N$QR
} * G0I2
} $-p#4^dg
private void fixUp(int k) { kpLx?zW--q
while (k > 1) { F7lzc)
int j = k >> 1; 56 [+;*
if (queue[j]>queue[k]) 6H'W]T&
break; .F^372hH3
SortUtil.swap(queue,j,k); JGG(mrvR
k = j; q:vc;y
} W`gzMx
} fZ[uNe[|
k#DMd9
} l0nm>ps'D
_,bDv`>Ra
} sMNhD/bb
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SortUtil： b 67l\L
cu )w6!f
package org.rut.util.algorithm; #Zj3SfU~`
.ovG_O
import org.rut.util.algorithm.support.BubbleSort; "?r_A*U
import org.rut.util.algorithm.support.HeapSort; \?~cJMN
import org.rut.util.algorithm.support.ImprovedMergeSort; Xcw6mpLt
import org.rut.util.algorithm.support.ImprovedQuickSort; NGL,j\(~7
import org.rut.util.algorithm.support.InsertSort; @*^%^ P
import org.rut.util.algorithm.support.MergeSort; hzV= 7
import org.rut.util.algorithm.support.QuickSort; ?my2dd,|
import org.rut.util.algorithm.support.SelectionSort; )=5,S~IT
import org.rut.util.algorithm.support.ShellSort; rPUk%S
J e.%-7f
/** DtglPo_(
* @author treeroot -a`PW
* @since 2006-2-2 &[qJ=HMm I
* @version 1.0 lqZUU92;
*/ wHE1Jqpo
public class SortUtil { TaNcnAY>9
public final static int INSERT = 1; {jOV8SVL
public final static int BUBBLE = 2; GFfZ TA
public final static int SELECTION = 3; 3fd?xhWbN
public final static int SHELL = 4; }2.0e5[
public final static int QUICK = 5; 9six]T
public final static int IMPROVED_QUICK = 6; J|.n bSE
public final static int MERGE = 7; qj1Fj
public final static int IMPROVED_MERGE = 8; F/w*[Xi Sh
public final static int HEAP = 9; v/[*Pze,C
Kw87 0n<
public static void sort(int[] data) { |h^]`= 3
sort(data, IMPROVED_QUICK); Yc2dq e>
} 0}qnq"
private static String[] name={ Jm[_X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mJ JF
}; -W.bOr
6S&OE k
private static Sort[] impl=new Sort[]{ ]*TW%mY
new InsertSort(), xV>sc;PEb
new BubbleSort(), {pz7ADK<
new SelectionSort(), J?_-Dg(=
new ShellSort(), rtC:3fDy
new QuickSort(), f(E[jwy
new ImprovedQuickSort(), &@fW6},iW
new MergeSort(), xFp?+a
new ImprovedMergeSort(), 9^1li2zk{
new HeapSort() @~C C$Y$
}; h%8C_mA
o@uZU4MM
public static String toString(int algorithm){ n0%5mTUN
return name[algorithm-1]; g[ O6WZ!F_
} 4`]
\fSo9$
public static void sort(int[] data, int algorithm) { Rg%Xy`gS
impl[algorithm-1].sort(data); 3S{3AmKj?
} ^Fg!.X_
oz&RNB.K
public static interface Sort { :@#6]W
public void sort(int[] data); OCv,EZ
} /amWf^z
V#TNv0&0
public static void swap(int[] data, int i, int j) { Z7J4rTA
int temp = data; Xz\X 8I
data = data[j]; N?><%fra
data[j] = temp; ~'VVCtA
} KSQ*HO)5
} Ws;X;7tS