[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; %sZ3Gpi
} 8N j}
int i1=l; IAb.Z+ig
int i2=mid+1; c"CR_
for(int cur=l;cur<=r;cur++){ \jZmu
if(i1==mid+1) p[|V7K'Z
data[cur]=temp[i2++]; >#S}J LZ
else if(i2>r) 7|Wst)_~j
data[cur]=temp[i1++]; ]3]B$
else if(temp[i1] data[cur]=temp[i1++]; .8'uIA{_2
else 32j#kJW
data[cur]=temp[i2++]; 9ec#'i=
} 753gcY#i
} .3XSF$;
07(LLhk@d
} {9P(U\]e]k
wD6QN
改进后的归并排序: uJ1oo| sn
nWf8r8
package org.rut.util.algorithm.support; 9"Dt3>Z
7r(c@4yPI
import org.rut.util.algorithm.SortUtil; 6 AY~>p
})mD{c/
/** eln$,zK/b
* @author treeroot [<^'}-SJ
* @since 2006-2-2 Y nTx)uW
* @version 1.0 cZ`%Gt6g
*/ ZX+0{E8a
public class ImprovedMergeSort implements SortUtil.Sort { 0#Q]>V@rO4
$LU|wW
private static final int THRESHOLD = 10; Mz) r'
+WR'\15u
/* :zfMRg
* (non-Javadoc) RcR-sbR
* D&N3LH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vgNrHq&2q
*/ h^WMv *2
public void sort(int[] data) { ]w-W
int[] temp=new int[data.length]; PK{FQ3b2{
mergeSort(data,temp,0,data.length-1); )P+<=8@a
} #MMp0
:$X dR:f}}
private void mergeSort(int[] data, int[] temp, int l, int r) { K`|V1L.m
int i, j, k; \\oa[nvL~
int mid = (l + r) / 2; _S &6XNV
if (l == r) F5UHkv"K&O
return; [ f<g?w
if ((mid - l) >= THRESHOLD) 4w 7vgB
mergeSort(data, temp, l, mid); .",BLuce
else b?M. 0{"H
insertSort(data, l, mid - l + 1); YD~(l-?"
if ((r - mid) > THRESHOLD) &d!ASa
mergeSort(data, temp, mid + 1, r); >N~jlr|
else pZc`!f"
insertSort(data, mid + 1, r - mid); PCBV6Y7r
m60hTJ?N)
for (i = l; i <= mid; i++) { ^6CPC@B1
temp = data; u!VrMH
} 3][
for (j = 1; j <= r - mid; j++) { us:v/WTQ
temp[r - j + 1] = data[j + mid]; op&j4R
} S!R(ae^}
int a = temp[l]; `X=[ m>
int b = temp[r]; s9u7zqCF
for (i = l, j = r, k = l; k <= r; k++) { (r<F@)J
if (a < b) { & )-fC
data[k] = temp[i++]; C}o^p"M*B3
a = temp; b!EqYT
} else { 0*uJS`se6Z
data[k] = temp[j--]; ^zG!Z:E
b = temp[j]; IMy!8$\u
} "zIQ(|TL?d
} Cq\{\!6[
} VdL }$CX$
Kt"4<'
/** Us>n`Lj@
* @param data ]h=y
* @param l :`@W`V?6-
* @param i W3MH8z
*/ V<n#%!M5gV
private void insertSort(int[] data, int start, int len) { JJ_KfnH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gp{Z]{io
} m&_!*3BAG
} ]7|qhAh<L
} X5Y. o&
} b%j4W)Z
uy=<n5`oNG
堆排序： #D+.z)iZn
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package org.rut.util.algorithm.support; 4`"Q!T_'
:|ytw=3>
import org.rut.util.algorithm.SortUtil; l2LO,j}
7'{Y7]+z+
/** U}-hV@y
* @author treeroot o107.s
* @since 2006-2-2 !-B|x0fs
* @version 1.0 g3(?!f
*/ B@vup {Kg
public class HeapSort implements SortUtil.Sort{ !ZN"(0#qz
+ldgT"
/* (non-Javadoc) aSSw>*?Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (rf8"T!"
*/ <$nMqUu0
public void sort(int[] data) { Wb{8WPS
MaxHeap h=new MaxHeap(); **n109R
h.init(data); M;0\fUh;
for(int i=0;i h.remove(); ':T"nORC
System.arraycopy(h.queue,1,data,0,data.length); ?=Mg"QU
} M[=sQnnSFW
G^\.xk]
private static class MaxHeap{ fd1z XK#Z2
pA5X<)~
void init(int[] data){ jpfFJon)w
this.queue=new int[data.length+1]; 8{-bG8L> 5
for(int i=0;i queue[++size]=data; B o[aiT
fixUp(size); #X<s_.7DJ
} )-LSn
} ZV:0:k.x
g\?7M1~
private int size=0; RLF]Wa,
be&,V_F
private int[] queue; p-%m/d?
]. ^e[v6
public int get() { u|&a!tOf2
return queue[1]; !2=eau^p
} .iEzEmu
Io)@u~yz
public void remove() { g _u
SortUtil.swap(queue,1,size--); !r_2b! dy
fixDown(1); t. kOR<
} myWa>Mvb
file://fixdown (w, Gv-S
private void fixDown(int k) { h4? 'd+K
int j; 6\/(TW&
while ((j = k << 1) <= size) { &28%~&L
if (j < size %26amp;%26amp; queue[j] j++; ^@xn3zJ
if (queue[k]>queue[j]) file://不用交换 9iOTT%pq
break; j1P#({z[
SortUtil.swap(queue,j,k); 7cT ~u
k = j; _O>8jH!#
} dmE.yVI"O
} ?(j:F2dU~
private void fixUp(int k) { r(/+- t
while (k > 1) { Lc13PTz>>g
int j = k >> 1; oyo V1jO
if (queue[j]>queue[k]) Z|$OPMLX
break; |1"n\4$
SortUtil.swap(queue,j,k); h-RL`X
k = j; | <l=i(
} LD)P. f
} s4{>7`N2
2z027P-Q
} x]jJ
X/`M'8v.%
} nfjwWDH
;_=+h,n
SortUtil： *z\L
CN<EgNt1kN
package org.rut.util.algorithm; i@#fyU)[G
$"]*,=-X
import org.rut.util.algorithm.support.BubbleSort; AtW<e;!0te
import org.rut.util.algorithm.support.HeapSort; W%^;:YQ9i
import org.rut.util.algorithm.support.ImprovedMergeSort; K)r|oW=6Y
import org.rut.util.algorithm.support.ImprovedQuickSort; >-Q=o,cl%3
import org.rut.util.algorithm.support.InsertSort; A"~4|`W
import org.rut.util.algorithm.support.MergeSort; {Zy)p%j8
import org.rut.util.algorithm.support.QuickSort; IH~[/qNk
import org.rut.util.algorithm.support.SelectionSort; 'nh^'i&0.
import org.rut.util.algorithm.support.ShellSort; :Z5Twb3h
xc6A&b>jI
/** _V-pr#lP1
* @author treeroot DS1_hbk
* @since 2006-2-2 ;B!u=_'
* @version 1.0 YA%0{Tdxz
*/ Vi_6O;
public class SortUtil { *k ^?L
public final static int INSERT = 1; *b+~@o
public final static int BUBBLE = 2; eww/tGa
public final static int SELECTION = 3; mR6hnKa_53
public final static int SHELL = 4; ]<IK0
public final static int QUICK = 5; ^26}j uQ
public final static int IMPROVED_QUICK = 6; El#"vIg(\
public final static int MERGE = 7; 3Ja1|;(2
public final static int IMPROVED_MERGE = 8; &x<y4ORH|
public final static int HEAP = 9; &F#K=R| .j
c.eA]mq
public static void sort(int[] data) { fjm(C#^-
sort(data, IMPROVED_QUICK); wxSJ
} _Kf8,|+
private static String[] name={ =S:Snk%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B(h%>mT[
}; TdWatvY5p
.7|Iausv
private static Sort[] impl=new Sort[]{ %uy5la
new InsertSort(), 24Uvi:B?~
new BubbleSort(), 5|0}
new SelectionSort(), UCVdR<<Z
new ShellSort(), Cmj+>$')0
new QuickSort(), "8sB,$
new ImprovedQuickSort(), 7S]<?>*
new MergeSort(), 1'"TO5
new ImprovedMergeSort(), _[t:Vme}v
new HeapSort() 7@uhw">mX
}; @Xg5E
9B<aYp)
public static String toString(int algorithm){ KoKd.%
return name[algorithm-1]; G=l-S\0@
} YecV+K'p:
;dVYR=l
public static void sort(int[] data, int algorithm) { FEwPLViso
impl[algorithm-1].sort(data); ;"Q.c#pA$g
} oK#UEn
ap|$8G
public static interface Sort { T_/ n#e
public void sort(int[] data); 0l+[[ZTV
} H4"'&A7$
s2*~n_B
public static void swap(int[] data, int i, int j) { -h8@B+
int temp = data; y0_z_S#gO
data = data[j]; r!e:sJAB.
data[j] = temp; zqt{oN_
} Sahz*f
} 9qvKg`YSh