[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; i-#Dc(9
} yRDtPK"E-
int i1=l; >s!k"s,
int i2=mid+1; nv(6NV
for(int cur=l;cur<=r;cur++){ +;)Xu}
if(i1==mid+1) "rc QS H
data[cur]=temp[i2++]; I~E&::,
else if(i2>r) -<AGCiLz
data[cur]=temp[i1++]; FW)~e*@8=
else if(temp[i1] data[cur]=temp[i1++]; :T>OJ"p
else L^PBcfg
data[cur]=temp[i2++]; 5E 9R+N
} +QOK]NJN
} jwuSne
4H@7t,>
} ooCfr?E
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改进后的归并排序: -G#m'W&
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package org.rut.util.algorithm.support; rmFcSolt,f
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import org.rut.util.algorithm.SortUtil; bPkz=^-
kY9$ M8b
/** U-$nwji
* @author treeroot " YOl6n
* @since 2006-2-2 -i_XP]b&
* @version 1.0 |+JC'b?,
*/ &m]jYvRc
public class ImprovedMergeSort implements SortUtil.Sort { Q4Qf/q;U
k'sPA_|
private static final int THRESHOLD = 10; _EP~PW#J
T.B7QAI. H
/* wbk$(P'gN
* (non-Javadoc) obv_?i1
* R((KAl]dL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aWP9i&
*/ p;D {?H/
public void sort(int[] data) { OB^j b8
int[] temp=new int[data.length]; MUCes3YJH
mergeSort(data,temp,0,data.length-1); (\wV)c9
} [M:<!QXw
<^W5UU#Pg
private void mergeSort(int[] data, int[] temp, int l, int r) { e5"5 U7
int i, j, k; G,1g~h%I$
int mid = (l + r) / 2; 8%a ^j\L
if (l == r) wSdiF-ue
return; O*n@!ye
if ((mid - l) >= THRESHOLD) l%?()]y
mergeSort(data, temp, l, mid); 3{Zd<JYg4-
else LY#V)f
insertSort(data, l, mid - l + 1); _?K,Jc8j.
if ((r - mid) > THRESHOLD) %WX^']p
mergeSort(data, temp, mid + 1, r); u?>8`]r
else 7xO~v23oe
insertSort(data, mid + 1, r - mid); FF|M7/[~
[o7Qr?RN
for (i = l; i <= mid; i++) { =+[`9
temp = data; F[)tg#}@G
} s"2+H}u
for (j = 1; j <= r - mid; j++) { Um*&S.y
temp[r - j + 1] = data[j + mid]; S0LaQ<9.
} -3m!970
int a = temp[l]; t8.3
int b = temp[r]; |eJR3o
for (i = l, j = r, k = l; k <= r; k++) { I SdB5Va
if (a < b) { Im]6-#(9\|
data[k] = temp[i++]; m}>Q#IVZ
a = temp; 'TA !JB+
} else { i.KRw6
data[k] = temp[j--]; k\g:uIsv$
b = temp[j]; ZG~d<kM&8s
} 5{vuN)K3
} 0h{&k7T<7
} GNHWbC6_m
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/** g'2;///
* @param data (rq(y$N
* @param l j6L(U~%
* @param i ~]n=TEJ>
*/ "3_GFq
private void insertSort(int[] data, int start, int len) { !\^W*nQ>l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $H&:R&Us
} m3&b)O7
} ,"YTG*ky
} JBLh4c3
} C5e;U
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堆排序： 8q:# '
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package org.rut.util.algorithm.support; IlB*JJnl
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import org.rut.util.algorithm.SortUtil; LyL(~Jc|
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/** nUisC5HW
* @author treeroot FJT0lC
* @since 2006-2-2 %'S[f
* @version 1.0 b"B:DDw00
*/ -MFePpUt
public class HeapSort implements SortUtil.Sort{ u*rHKZ9i
q0NToVo@
/* (non-Javadoc) I8YCXh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^uPg71r:
*/ EG3u)}vI
public void sort(int[] data) { Ynp#3r
MaxHeap h=new MaxHeap(); 4Tb"+Y}
h.init(data); wti
for(int i=0;i h.remove(); gP |>gy#e
System.arraycopy(h.queue,1,data,0,data.length); aP"!}*
} ${gO=Z
?},RN
private static class MaxHeap{ $ ?|;w,%I
z*9 ke
void init(int[] data){ ud"Kko Rt
this.queue=new int[data.length+1]; *M$'dLn
for(int i=0;i queue[++size]=data; !fjB oK+
fixUp(size); 6qWWfm/6
} wyXQP+9G
} Dv&K3^~Rfb
bfy=
private int size=0; {kr14l*2
w"?RbA
private int[] queue; \)ZCB7|
;mPX8bT
public int get() { G&"O)$h
return queue[1]; }]JHY P\
} DKkilqVM
{<?8Y
public void remove() { T)',}=
SortUtil.swap(queue,1,size--); :+"H h%
fixDown(1); e*U6^Xex
} s'$2 }K
file://fixdown R'" c
private void fixDown(int k) { (L(n%
int j; J;4aghzY
while ((j = k << 1) <= size) { jx2{kK
if (j < size %26amp;%26amp; queue[j] j++; 14 (sp
if (queue[k]>queue[j]) file://不用交换 @7KG0<]h
break; X; 6=WqJj
SortUtil.swap(queue,j,k); sV\K[4HG
k = j; 0?dr(
} U.JE \/
} W+5. lf=2>
private void fixUp(int k) { S5d
while (k > 1) { \f)GW$`
int j = k >> 1; 1l Cr?
if (queue[j]>queue[k]) OkfxX&n
break; ),|z4~
SortUtil.swap(queue,j,k); 3rjKwh7
k = j; Y*S:/b~y
} U3Z-1G~*r
} PTqia!
]hoq!:>M1
} WjCxTBI
*ZxurbX#
} J0oeCb
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SortUtil： bdG@%K',
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package org.rut.util.algorithm; 0/9]TIc
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import org.rut.util.algorithm.support.BubbleSort; ,>8w|951'
import org.rut.util.algorithm.support.HeapSort; e =r b
import org.rut.util.algorithm.support.ImprovedMergeSort; $*T?}r>
import org.rut.util.algorithm.support.ImprovedQuickSort; t,IOq[Vtk
import org.rut.util.algorithm.support.InsertSort; ?r@^9
import org.rut.util.algorithm.support.MergeSort; !a-B=pn!]
import org.rut.util.algorithm.support.QuickSort; Ip:54
import org.rut.util.algorithm.support.SelectionSort; xwi6#>
import org.rut.util.algorithm.support.ShellSort; 44|tCB`
a^pbBDi W
/** !?/:p.
* @author treeroot k~ByICE
* @since 2006-2-2 XM,slQ
* @version 1.0 ai-rF^ehC
*/ V)N{Fr)&
public class SortUtil { !8|}-eFY
public final static int INSERT = 1; nosD1sS.K8
public final static int BUBBLE = 2; PP>6
public final static int SELECTION = 3; %dv?n#Uf
public final static int SHELL = 4; /XEW]/4
public final static int QUICK = 5; ~x#TfeU]
public final static int IMPROVED_QUICK = 6; -Ou.C7ol
public final static int MERGE = 7; Dfa3&##{
public final static int IMPROVED_MERGE = 8; l $"hhI8
public final static int HEAP = 9; 13`Mt1R
pDSNI2
public static void sort(int[] data) { . R/y`:1:W
sort(data, IMPROVED_QUICK); ?1a9k@[t
} 46Sz#^y P
private static String[] name={ %S}uCqcAK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6CIzT.
}; ``Q6R2[|)
<7`zc7c]#
private static Sort[] impl=new Sort[]{ =4a:)g'
new InsertSort(), G7Sw\wW
new BubbleSort(), ]p3f54!
new SelectionSort(), \/o$io,kV
new ShellSort(), &Xqxuy ]J
new QuickSort(), |f#hGk6
new ImprovedQuickSort(), hN &?x5aC>
new MergeSort(), yy7(')wKO
new ImprovedMergeSort(), x9 %=d
new HeapSort() AXW.`~ 4
}; <78|~SKAV
$2?AJ/2r$b
public static String toString(int algorithm){ Mzp<s<BX
return name[algorithm-1]; =abcLrf2G
} 7RL J
{;c'@U
public static void sort(int[] data, int algorithm) { . : Wf>:
impl[algorithm-1].sort(data); \}s/<Q
} O {1" I
Qs6Vu)U=
public static interface Sort { 7"!b5(4=
public void sort(int[] data); v$|~ g'6
} '|[V}K5m/f
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public static void swap(int[] data, int i, int j) { &>,;ye>A
int temp = data; Q'/sP 5Pj
data = data[j]; X8$Mzeq
data[j] = temp; *9^8NY]
} U]=yCEb8p
} @MES.g