[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; >m lQ@Z_O
} 'dBe,@
int i1=l; {Ni]S$7
int i2=mid+1; Ojz'p5d`>
for(int cur=l;cur<=r;cur++){ 3m75mny
if(i1==mid+1) Nzgi)xX0HX
data[cur]=temp[i2++]; ?xv."I%
else if(i2>r) uz+WVmb
data[cur]=temp[i1++]; 2iM}YCV
else if(temp[i1] data[cur]=temp[i1++]; Tk[]l7R~
else .*YF{!R`h
data[cur]=temp[i2++]; )B $Q
} %ZD]qaU0
} P\K#q%8
DgcS@N
} %J2Ad
b?OA|JqX
改进后的归并排序: >k`qPpf&
[ x+-N7
package org.rut.util.algorithm.support; \&+Y;:6
}*rSg .
import org.rut.util.algorithm.SortUtil; ]wDqdD y7S
qdZ ^D
/** eY#^vB
* @author treeroot wipl5O@L
* @since 2006-2-2 X<IW5*
* @version 1.0 40MKf/9
*/ \:Tq0|]Px
public class ImprovedMergeSort implements SortUtil.Sort { 9d|8c > I
8/j|=Q,5
private static final int THRESHOLD = 10; ` Ny(S2
#*pB"L
/* 'kj q C
* (non-Javadoc) {1Cnrjw
* 0J/yd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V0{#q/q
*/ +`wr{kB$~
public void sort(int[] data) { UfPB-EFl$D
int[] temp=new int[data.length]; 7/a7p(
mergeSort(data,temp,0,data.length-1); >b"@{MZ@t
} ,N:^4A
`AE6s.p?
private void mergeSort(int[] data, int[] temp, int l, int r) { p5E okh
int i, j, k; !yj1X Ar
int mid = (l + r) / 2; ij:a+T
if (l == r) `q]' ^EzJ
return; @mZK[*Ak<*
if ((mid - l) >= THRESHOLD) nI?*[y}
mergeSort(data, temp, l, mid); @d{}M)6\!
else *LhwIY
insertSort(data, l, mid - l + 1); 1Q FsT
if ((r - mid) > THRESHOLD) 'Up75eT
mergeSort(data, temp, mid + 1, r); RQWUO^&e^
else O,),0zcYF
insertSort(data, mid + 1, r - mid); MOB4t|
]\K?%z
for (i = l; i <= mid; i++) { l=9D!64
temp = data; } 'xGip@W
} $/ "+t.ir3
for (j = 1; j <= r - mid; j++) { @bTm.3
temp[r - j + 1] = data[j + mid]; Pq<43:*?
} Eh;Ia6}
int a = temp[l]; $:5h5Y#z
int b = temp[r]; zUJXA:L9
for (i = l, j = r, k = l; k <= r; k++) { p*jU)@a0
if (a < b) { $]#8D>E&
data[k] = temp[i++]; N)cODy([
a = temp; uq9mq"
} else { !QAndg{;D
data[k] = temp[j--]; !{V`N|0
b = temp[j]; yx`@f8Kr
} YIW9z{rrs
} [V_mF
} pW8?EGO@
p&Nav,9x
/** {BM:c$3@j
* @param data :|k!hG
* @param l gYbvCs8O!
* @param i hb~d4J=S
*/ |mG;?>c)
private void insertSort(int[] data, int start, int len) { bny@AP(CY+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =aj|auu
} U[;ECw@
} "fNv(> -7s
} EhO\N\p(Q=
} BYB9M
JYjc^m
堆排序： |1ry*~
S|u5RU8*"|
package org.rut.util.algorithm.support; lbIW1z%:sy
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import org.rut.util.algorithm.SortUtil; (.oDxs()I
,agkV)H
/** wMF1HT<*
* @author treeroot #F .8x@
* @since 2006-2-2 ~O./A-l
* @version 1.0 ;/m>c{
*/ coaJDg+
public class HeapSort implements SortUtil.Sort{ .O~rAu*K
G@ybx[_[@
/* (non-Javadoc) /s)It
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vA*NJ%&`
*/ *sfz+8Y
public void sort(int[] data) { *X|%H-Q:H`
MaxHeap h=new MaxHeap(); FGwgSrXL7
h.init(data); QKz2ONV=)
for(int i=0;i h.remove(); c$A}mL_
System.arraycopy(h.queue,1,data,0,data.length); /KvpJ4
} Z#%77!3
Vyx&MU.-J
private static class MaxHeap{ OZObx
JLyFkV/
void init(int[] data){ rUiUv(q
this.queue=new int[data.length+1]; mOjl0n[To]
for(int i=0;i queue[++size]=data; ~ C_2D?
fixUp(size); wAb_fU&*
} >273V+dy
} QQ,w:OjA0
nDchLVw
private int size=0; hi]\M)l&x
1 gRR
private int[] queue; ?~VevD
',RR*{I
public int get() { }Ty_} 6a5
return queue[1]; D3 E!jQ1
} s3T6"%S`
pm;g)p?
public void remove() { naB[0I& N
SortUtil.swap(queue,1,size--); )=D9L
fixDown(1); Md m(xUs
} PsD]gN5"
file://fixdown 8%U)EU
private void fixDown(int k) { qdu:kA:]
int j; 8|Y^z_C
while ((j = k << 1) <= size) { Z=sAR(n}~
if (j < size %26amp;%26amp; queue[j] j++; <~8W>Y\m
if (queue[k]>queue[j]) file://不用交换 }#u}{
break; CnA*o 8w
SortUtil.swap(queue,j,k); n#]G!7
k = j; |s`q+ U-
} G6Fg<g9:
} +l3 vIN
private void fixUp(int k) { d ly 0874
while (k > 1) { X:g5>is|
int j = k >> 1; 1X9sx&5H
if (queue[j]>queue[k]) Em.?
break; YGn:_9
SortUtil.swap(queue,j,k); |$0/:*
k = j; E0h!%/+-L
} ;~q)^.K3
} U&a]gkr
F^~#D, \
} p_(hM&>C
aY+>85?g
} Wl2>U(lj
|Z/ySAFM
SortUtil： %`\{Nxk
Y\x Xo?
package org.rut.util.algorithm; nBj7Q!lW
t-Fl"@s
import org.rut.util.algorithm.support.BubbleSort; gddGl=rm
import org.rut.util.algorithm.support.HeapSort; MdfkC6P
import org.rut.util.algorithm.support.ImprovedMergeSort; %?$"oWmenS
import org.rut.util.algorithm.support.ImprovedQuickSort; LMDa68 s
import org.rut.util.algorithm.support.InsertSort; 0nd<6S+fs
import org.rut.util.algorithm.support.MergeSort; cS[`1y,\3
import org.rut.util.algorithm.support.QuickSort; u!S{[7 FY
import org.rut.util.algorithm.support.SelectionSort; K&h|r`W(
import org.rut.util.algorithm.support.ShellSort; vtT:c.~d
EkBM>*W
/** Vqr&)i"b$
* @author treeroot ~!OjdE!u
* @since 2006-2-2 <.2Z{;z
* @version 1.0 N!3f1d7RQ
*/ $p@g#3X`
public class SortUtil { G#C)]4[n
public final static int INSERT = 1; L$Q+R'
public final static int BUBBLE = 2; ^eRuj)$5A
public final static int SELECTION = 3; re*/JkDq3K
public final static int SHELL = 4; !]nCeo
public final static int QUICK = 5; (65p/$Vh
public final static int IMPROVED_QUICK = 6; `xr%LsNn
public final static int MERGE = 7; +1%6-g4"
public final static int IMPROVED_MERGE = 8; 7$;$4.'
public final static int HEAP = 9; G!IQ<FuY
{mQJ6 G'ny
public static void sort(int[] data) { #@fypCc
sort(data, IMPROVED_QUICK); gr=`_k4~1
} XTJ>y@
private static String[] name={ vX\e* v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9lxT5Wg
}; .%A2
+*q@=P,
private static Sort[] impl=new Sort[]{ JNz0!wi
new InsertSort(), -G 'lyH
new BubbleSort(), Ymu=G3-
new SelectionSort(), -Me\nu8(RF
new ShellSort(), =.c"&,c?L
new QuickSort(), :Eyv==
new ImprovedQuickSort(), c"ztrKQQ
new MergeSort(), nmGHJb,$
new ImprovedMergeSort(), EoeEg,'~F
new HeapSort() ;GSJnV
}; M}Mzm2d#`
?s]`G'=>V`
public static String toString(int algorithm){ ]N_^{k,
return name[algorithm-1]; `9l\~t(M
} Hi9z<l=$
YP,PJnJU8
public static void sort(int[] data, int algorithm) { #Au&2_O
impl[algorithm-1].sort(data); (&,R1dLo
} $NHWg(/R@
Uj)]nJX
public static interface Sort { ]o$/xP
public void sort(int[] data); 8B/9{8
} df& |Lc1J
8A.7=C' z
public static void swap(int[] data, int i, int j) { 'wrpW#
int temp = data; ;g jp&g9Q
data = data[j]; 6,1|y%(f
data[j] = temp; 5QJL0fc
} h$\hPLx
} qGCg3u6