[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;iR_7T5
} Q$^oIFb
int i1=l; Ru9QQaHE
int i2=mid+1; q'fZA;
for(int cur=l;cur<=r;cur++){ aEM2xrhy,
if(i1==mid+1) Z9,-FO{#3-
data[cur]=temp[i2++]; F[RQ6PW
else if(i2>r) Nk*d=vj
data[cur]=temp[i1++]; $aDAD4mmm
else if(temp[i1] data[cur]=temp[i1++]; \R\?`8Orz
else p#go<Y#
data[cur]=temp[i2++]; Q'>pOtJG*J
} )O*\}6:S
} 3|x*lmit
:[YHJaK
} *")Req
[|.IXdJ!
改进后的归并排序: =bgzl=A`
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package org.rut.util.algorithm.support; R~ n[g
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import org.rut.util.algorithm.SortUtil; wrI66R}@
uj;tmK>;
/** cBZ$$$v\#
* @author treeroot pY]T32
* @since 2006-2-2 9K,PT.c
* @version 1.0 1k"<T7K
*/ (dmLEt
public class ImprovedMergeSort implements SortUtil.Sort { ?gD^K,A Hd
c_wvuKa
private static final int THRESHOLD = 10; Pfi|RTX$'*
+L(|?|i8
/* a|S6r-_;s
* (non-Javadoc) pZHx
* Vi1l^ Za
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?i'N9 /(
*/ $r+_Y/
public void sort(int[] data) { 4:wVT;?a
int[] temp=new int[data.length]; v_^>*Vm*
mergeSort(data,temp,0,data.length-1); U1nObA
} C)Ep}eHjf_
XNbeYj
private void mergeSort(int[] data, int[] temp, int l, int r) { eLFxGZZ
int i, j, k; u|(;SY
int mid = (l + r) / 2; iF,%^95=
if (l == r) TP3KT)
return; Ql>bsr}
if ((mid - l) >= THRESHOLD) 9B3+$uP
mergeSort(data, temp, l, mid); tBUn KPT
else %vn"tp
insertSort(data, l, mid - l + 1); KEfN!6
if ((r - mid) > THRESHOLD) 0MpZdJ
mergeSort(data, temp, mid + 1, r); =)b!M^=X-a
else @~7y\G
insertSort(data, mid + 1, r - mid); =1#obB
m4\e`nl
for (i = l; i <= mid; i++) { >ElK8
temp = data; NW]zMU{c
} 'k'"+
for (j = 1; j <= r - mid; j++) { t?Ku6Z'
temp[r - j + 1] = data[j + mid]; Dxvizd>VU
} 1FA:"0lO
int a = temp[l]; A4{14Y;?
int b = temp[r]; ) KvGJo)("
for (i = l, j = r, k = l; k <= r; k++) { d!57`bVOd
if (a < b) { &ci;0P#Q
data[k] = temp[i++]; m3#rU%Wj
a = temp; l6_dVK;s
} else { iHa:6
data[k] = temp[j--]; wE~&Y?^
b = temp[j]; CH9Psr78
} x3AAn,m8
} CKE):kHu
} MD98N{+[|
E4N/or
/** DbWaF5\yD
* @param data 1VKu3
* @param l "%(SLQOyy
* @param i 9QP-~V{$
*/ :_8Nf1B+T
private void insertSort(int[] data, int start, int len) { ~`97?6*Ra
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -kk0zg &|i
} Talmc|h
} "LNLM
} =O%Hf bx
} G!)Q"+
:X*$U ~aQ
堆排序： S:lie*Aux*
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package org.rut.util.algorithm.support; 8AVtUU
?ESsma6
import org.rut.util.algorithm.SortUtil; 3d`u!i?/
b9;w3Ba
/** ni$;"RGC
* @author treeroot &K*Kr=9N
* @since 2006-2-2 \/s0p
* @version 1.0 NR3h|'eC
*/ 3*zywcTH
public class HeapSort implements SortUtil.Sort{ Lm8uN?
W"Tj.oCUG
/* (non-Javadoc) #=V\WQb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QQ,V35Vp[
*/ +mPVI
public void sort(int[] data) { 5pU/X.lc
MaxHeap h=new MaxHeap(); 6e>P!bo
h.init(data); _]v@Dq VP
for(int i=0;i h.remove(); @+{F\SD\
System.arraycopy(h.queue,1,data,0,data.length); oTJ^WePZQ
} "c.@4#/_
s^> >]
private static class MaxHeap{ WES$B7y
2kcDJ{(
void init(int[] data){ RkZyqt @+
this.queue=new int[data.length+1]; cJE4uL<
for(int i=0;i queue[++size]=data; %p:Z(zU
fixUp(size); I@oSRB
} WF_v>g:g
} gNJdP!(t
!bIE%cq
private int size=0; B[IWgvB(e
!]3kFWs
private int[] queue; MTip4L W9
cT5BBR
public int get() { p\P)
return queue[1]; =w!2R QB
} Pcjrv:0$
7,s5Gd-
public void remove() { LAFxeo
SortUtil.swap(queue,1,size--); -^Qm_lN
fixDown(1); 8<x& Xd
} R=<%!
file://fixdown @'A0Lq+#
private void fixDown(int k) { F/PH=Dk
int j; T/FZn{I
while ((j = k << 1) <= size) { T>pyYF1Q
if (j < size %26amp;%26amp; queue[j] j++; U.WXh(`%
if (queue[k]>queue[j]) file://不用交换 ;X;(7
break; @\r2%M-
SortUtil.swap(queue,j,k); z=TOGP(
k = j; |- <72$j
} T`bUBrK6g`
} zR4]buHnE
private void fixUp(int k) { naM~>N
while (k > 1) { ~s yWORiXm
int j = k >> 1; aL*}@|JL"
if (queue[j]>queue[k]) OIK46D6?.
break; R.?PD$;_M
SortUtil.swap(queue,j,k); 8aJJ??o{
k = j; $h}5cl
} h=qT@)h1>
} u* G+=aV.6
g^}C/~b[
} W] WH4.y
+eO>> ~Z
} "Zy:q'`o
;b(ww{&
SortUtil： (*b<IGi;
I$R1#s
package org.rut.util.algorithm; hQ}_(F_H
P4zwTEk`
import org.rut.util.algorithm.support.BubbleSort; ^f57qc3nF
import org.rut.util.algorithm.support.HeapSort; [mQdc?n\
import org.rut.util.algorithm.support.ImprovedMergeSort; Y/5(BK)
import org.rut.util.algorithm.support.ImprovedQuickSort; vN:!{)~z
import org.rut.util.algorithm.support.InsertSort; 4JyA+OD4{
import org.rut.util.algorithm.support.MergeSort; IT7],pM
import org.rut.util.algorithm.support.QuickSort; FUf.3@}
import org.rut.util.algorithm.support.SelectionSort; 9)8Cf%<(
import org.rut.util.algorithm.support.ShellSort; &6vWz6!P
+$Y*1{hyOo
/** h$}PQ
* @author treeroot B&7NF}CF2
* @since 2006-2-2 dVk(R9 8
* @version 1.0 QJ(5o7Tfn
*/ f5p/cUzX
public class SortUtil { A;^ iy]"
public final static int INSERT = 1; cU-A1W
public final static int BUBBLE = 2; NMQG[py!f
public final static int SELECTION = 3; E[7E%^:Mg
public final static int SHELL = 4; |Y8}*C\M.h
public final static int QUICK = 5; 1szObhN-l
public final static int IMPROVED_QUICK = 6; 6O,:I
public final static int MERGE = 7; R(*t1R\
public final static int IMPROVED_MERGE = 8; RO|8NC<oj
public final static int HEAP = 9; <W>A }}q
V1,/qd_
public static void sort(int[] data) { g*(z.
sort(data, IMPROVED_QUICK); LuHRB}W
} ;aj;(Z.p)
private static String[] name={ AloL+eN@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^_i)XdPU
}; b;{"@b,Y
}#-@5["-X
private static Sort[] impl=new Sort[]{ `N&*+!O%
new InsertSort(), ^{{a v?h
new BubbleSort(), q)f_!N
new SelectionSort(), Bz <I7h
new ShellSort(), )0/*j]Kf
new QuickSort(), mE5{)<N:C
new ImprovedQuickSort(), iE}] E
new MergeSort(), L N Fe7<y
new ImprovedMergeSort(), j"'a5;Sy
new HeapSort() w@&z0ODJ
}; I`*5z;Q!%@
S0Io$\ha
public static String toString(int algorithm){ kz1#"8Zd!
return name[algorithm-1]; /a<UKh:A[
} U<Tv<7`
[*Ai@:F
public static void sort(int[] data, int algorithm) { ?AD-n6
impl[algorithm-1].sort(data); Z'>UR.g
} %8D>aS U
g1|Pyt{
public static interface Sort { t0jE\6r
public void sort(int[] data); IG# wY
} Pc=ei
:o~'\:/
public static void swap(int[] data, int i, int j) { C0KFN
int temp = data; 7Mq{Py1
data = data[j]; bhGRD{=
data[j] = temp; _/z_ X
} :IBP "
} \O4s0*gw