[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; us:V\V
} z;74(5?q
int i1=l; 6z(eW]p
int i2=mid+1; mp\`9j+{
for(int cur=l;cur<=r;cur++){ "(U%Vg|)
if(i1==mid+1) T9N&Nh7 3
data[cur]=temp[i2++]; JLZ[sWP='
else if(i2>r) #4iiY6
data[cur]=temp[i1++]; T\Zq/Z\
else if(temp[i1] data[cur]=temp[i1++]; g#=~A&4q
else HifU65"8
data[cur]=temp[i2++]; :EXH8n&|
} /!u#S9_B
} @`</Z)
uAWmg8
} |&>!"27;w
xEA%UFB.!G
改进后的归并排序: icX$<lD
|H,g}XWMU
package org.rut.util.algorithm.support; rRfPq
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import org.rut.util.algorithm.SortUtil; pO~VI$7
CkJU5D
/** V?k"BU
* @author treeroot wR"4slY_%
* @since 2006-2-2 6Wos6_
* @version 1.0 d^&F%)AT
*/ aWLeyXsAu
public class ImprovedMergeSort implements SortUtil.Sort { CQq'x+{F
+dkbt%7M
private static final int THRESHOLD = 10; /$IF!q+C
pY3N7&m\:
/* j'?^<4i
* (non-Javadoc) t*fG;YOg
* -*?Y4}mK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pvz*(u
*/ 9"@P.8_
public void sort(int[] data) { 4b"%171
int[] temp=new int[data.length]; [ imC21U
mergeSort(data,temp,0,data.length-1); a?+Ni|+
} [7gyF}*;
!U,^+"l'GP
private void mergeSort(int[] data, int[] temp, int l, int r) { ^ExA
int i, j, k; bb6 ~H
int mid = (l + r) / 2; b&$ ?.z
if (l == r) seFug
return; :'OCQ.[{s
if ((mid - l) >= THRESHOLD) ?kICYtY:_b
mergeSort(data, temp, l, mid); ${$XJs4
else q\qV~G`
insertSort(data, l, mid - l + 1); XUD/\MoV
if ((r - mid) > THRESHOLD) 9<An^lLK*
mergeSort(data, temp, mid + 1, r); O<R6^0B42
else W|U!kqU
insertSort(data, mid + 1, r - mid); :!a9|Fh~
wz*QB6QtU
for (i = l; i <= mid; i++) { (K$K;f$"r
temp = data; r9Ux=W\
} O&#bC
for (j = 1; j <= r - mid; j++) { 2`#jw)dM;}
temp[r - j + 1] = data[j + mid]; w;.'>ORC
} (~oUd4
int a = temp[l]; %h**L'~``
int b = temp[r]; ?Z@FxW
for (i = l, j = r, k = l; k <= r; k++) { |Xblz1>DF
if (a < b) { L~1u?-zu
data[k] = temp[i++]; 4C(vBKl
a = temp; @GGzah#
} else { $]CZ]EWts
data[k] = temp[j--]; 5_+vjV;5
b = temp[j]; 6h N~<
} B$k<F8!%
} ?lv{;4BC
} f\"Qgn
f>JuxX\G
/** omM*h{z$$
* @param data eI?<*
* @param l WYTeu "
* @param i tRYMK+
*/ @v9PI/c
private void insertSort(int[] data, int start, int len) { A)En25,X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2 [a#wz'
} ZLdvzH@'
} }N5>^y
} chsjY]b
} 2q J}5
[7?K9r\#
堆排序： %4U;Rdq&Ud
v?rjQ'OP
package org.rut.util.algorithm.support; #d%'BUde
nMD^x
import org.rut.util.algorithm.SortUtil; ~C< X~$y&
< vU<:S
/** \pZ,gF;y
* @author treeroot 6\)61o_1|
* @since 2006-2-2 E;~gQ6vAI
* @version 1.0 ,v:m
*/ 7]YLe+Ds
public class HeapSort implements SortUtil.Sort{ .Vux~A
<OF7:f
/* (non-Javadoc) bp2l%A;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oju7<b9Ez
*/ ^AMcZ6!\
public void sort(int[] data) { 0\%/:2
MaxHeap h=new MaxHeap(); STs~GOm-
h.init(data); J&S$F:HM
for(int i=0;i h.remove(); *. l,_68
System.arraycopy(h.queue,1,data,0,data.length); -,Cx|Nl
} M(x5D;db/
#gi0FXL
private static class MaxHeap{ 3N(s)N_P M
~WU _u,:
void init(int[] data){ @jO3+
this.queue=new int[data.length+1]; ]uX'[Z}t
for(int i=0;i queue[++size]=data; w"$CV@AJ
fixUp(size); ^ruS
} t>f<4~%MJ
} n(,b$_JK7
R_\{a*lV0
private int size=0; @Z~lM5n$8
6#fl1GdH-
private int[] queue; #9}E@GGs
s;X"E=
public int get() { _KC)f'Cx
return queue[1]; z$oA6qB)
} *qYcb} ]
{NXc<0a(
public void remove() { mf6?8!O}>
SortUtil.swap(queue,1,size--); Ji4c8*&Jpc
fixDown(1); :pcKww|V
} CFAz/x@%
file://fixdown 0e9W>J9
private void fixDown(int k) { NqvL,~1G
int j; lBh|+KN
while ((j = k << 1) <= size) { U|6ME%xm
if (j < size %26amp;%26amp; queue[j] j++; qlD+[`=b
if (queue[k]>queue[j]) file://不用交换 _H>ABo
break; B;Ab`UX#t
SortUtil.swap(queue,j,k); KB <n-'
k = j; L)&?$V
} "AP''XNi
} ?Q;8D@
private void fixUp(int k) { cW;to Q!P
while (k > 1) { JYOyz+wNd
int j = k >> 1; @4Z>;
if (queue[j]>queue[k]) l;}D| 6+_W
break; ]Gm,sp.x
SortUtil.swap(queue,j,k); 2+ F34
k = j; FYR%>Em
} K/79Tb-
} /vS!9f${
8:0QIkqk
} ,n TC7V
wQWokpP;T7
} o1YX^-<[F
7'Y 3T[
SortUtil： "pdmz+k8S
Gp'rN}i^
package org.rut.util.algorithm; SdBv?`u|g
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import org.rut.util.algorithm.support.BubbleSort; {ER! 0w/
import org.rut.util.algorithm.support.HeapSort; &Z/aM?
import org.rut.util.algorithm.support.ImprovedMergeSort; z kQV$n{
import org.rut.util.algorithm.support.ImprovedQuickSort; 4\4onCzuT
import org.rut.util.algorithm.support.InsertSort; S-WD?BFC
import org.rut.util.algorithm.support.MergeSort; 'Dv `Gj
import org.rut.util.algorithm.support.QuickSort; ``j..v,
import org.rut.util.algorithm.support.SelectionSort; I!&|L0Qq
import org.rut.util.algorithm.support.ShellSort; fs+l
H!Z=}>TN
/** H_m(7@=
* @author treeroot 2s>dlz
* @since 2006-2-2 V$%%nG uE
* @version 1.0 [H)NkR;I
*/ 0b+OB pqN
public class SortUtil { }tv%
public final static int INSERT = 1; jnsV'@v8Nj
public final static int BUBBLE = 2; Ks.m5R
public final static int SELECTION = 3; /2pf*\u
public final static int SHELL = 4; 3US}('
public final static int QUICK = 5; e}yoy+9
public final static int IMPROVED_QUICK = 6; YMOy6C
public final static int MERGE = 7; $r)+7i
public final static int IMPROVED_MERGE = 8; DKgwi'R
public final static int HEAP = 9; [~9rp]<
VXXo\LQUU
public static void sort(int[] data) { lb ol+O65
sort(data, IMPROVED_QUICK); l?v`kAMR
} 90L,.
private static String[] name={ eWzD'3h^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *c4uCI:0t
}; ..6 : _{wg
?nJ7lLQA
private static Sort[] impl=new Sort[]{ |#8u:rguy
new InsertSort(), |6w.m<p
new BubbleSort(), rStfluPL
new SelectionSort(), fH~InDT^
new ShellSort(), FJKW=1=,
new QuickSort(), x4|>HY<p?
new ImprovedQuickSort(), wU,{5w
new MergeSort(), P.Pw.[:3
new ImprovedMergeSort(), |3{DlZ2S
new HeapSort() y>wrm:b-O
}; 48dIh\TH"
&}wrN(?w
public static String toString(int algorithm){ +^tq?PfE
return name[algorithm-1]; | n5F_RL
} 3"=%[
M,@\*qlEJ
public static void sort(int[] data, int algorithm) { v(D{_
impl[algorithm-1].sort(data); HL$}Gh]q
} n^P=a'+
j~,7JJ (y
public static interface Sort { a7'.*H]
public void sort(int[] data); C{>@b:]p
} q<`YJ,
<"w;:Zs
public static void swap(int[] data, int i, int j) { hZ2!UW4'
int temp = data; [.4R ,[U
data = data[j]; ^|y6oj
data[j] = temp; wy6>^_z
} Awl4*J~
} N%N%