[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; LYhgBG,
} \bw71( Q
int i1=l; |\TOSaZ
int i2=mid+1; P%z\^\p"5
for(int cur=l;cur<=r;cur++){ 8xJdK'
if(i1==mid+1) *91iFeKj=
data[cur]=temp[i2++]; d8`^;T ;}d
else if(i2>r) ?7 e|gpQ|
data[cur]=temp[i1++]; 6a[D]46y,2
else if(temp[i1] data[cur]=temp[i1++]; 7h?PVobe
else z'=*pIY5f
data[cur]=temp[i2++]; :WIbjI=
} S5*wUd*p#
} D|/Azy.[
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} H0Qpc<Z4/
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改进后的归并排序: LKieOgX
7}(wEC
package org.rut.util.algorithm.support; }00mJ]H(
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import org.rut.util.algorithm.SortUtil; v%n'_2J =^
I~\j%zD
/** WCA`34(
* @author treeroot {:xINQ=}D
* @since 2006-2-2 O6LZ<}oUR
* @version 1.0 [X0Wfb}{
*/ mVfg+d(
public class ImprovedMergeSort implements SortUtil.Sort { M,"4r^%k
I~H:-"2
private static final int THRESHOLD = 10; XL c&7
ny%-u&1k
/* IE.JIi^w
* (non-Javadoc) G,9osTt/
* 5|f[evQj<S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5<w"iqZ\?N
*/ A\ds0dUE
public void sort(int[] data) { Izm8 qt=m
int[] temp=new int[data.length]; I1^0RB{~
mergeSort(data,temp,0,data.length-1); Yxz(g]
} AX}l~ sv
`An|a~G1
private void mergeSort(int[] data, int[] temp, int l, int r) { zD}dvI}
int i, j, k; ke_Dd?
int mid = (l + r) / 2; jJdw\`
if (l == r) |(N4ZmTm
return; _;3xG0+
if ((mid - l) >= THRESHOLD) lfG]^id'
mergeSort(data, temp, l, mid); V^B'T]s
else KGdL1~
insertSort(data, l, mid - l + 1); *L7 ZyERs
if ((r - mid) > THRESHOLD) " NnUu8x
mergeSort(data, temp, mid + 1, r); eyBLgJt8P
else Lo _5r T"
insertSort(data, mid + 1, r - mid); (.4mX t
Ta`=c0
for (i = l; i <= mid; i++) { Uq `B#JI
temp = data; }+G6`Zd
} unKTa*U^q
for (j = 1; j <= r - mid; j++) { ]u 4
temp[r - j + 1] = data[j + mid]; wG6>.`:
} -8;U1^#
int a = temp[l]; Tu95qL~^
int b = temp[r]; U1G"T(;s:
for (i = l, j = r, k = l; k <= r; k++) { \M(0@#-$C
if (a < b) { ++D-,>.
data[k] = temp[i++]; PCDsj_e
a = temp; >Pj ?IE6
} else { H(9%SP@[c
data[k] = temp[j--]; S]mXfB(mh
b = temp[j]; ~c~N _b
} C-'n4AY^
} pe$" nUy|
} ]+\;pb}bq
ce-5XqzY@
/** Z8$n-0Ww
* @param data IoWh&(+KdH
* @param l &QFg=
* @param i *m6~x-x
*/ &Iv3_T<AF
private void insertSort(int[] data, int start, int len) { (4=NKtA^G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); INqD(EG
} U;p"x^U`
} .si!`?K%[
} s"*ZQ0OaD
} '*H&s
]`39E"zY
堆排序： %K[_;8
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package org.rut.util.algorithm.support; ]FV,}EZ
@)=\q`vV
import org.rut.util.algorithm.SortUtil; E-jL"H*
I?c "\Fe
/** mTXeIng?
* @author treeroot gE2k]`[j]
* @since 2006-2-2 F;$z[z
* @version 1.0 ?IRp3H
*/ s8;/'?K
public class HeapSort implements SortUtil.Sort{ Q${0(#Nu
Ca}T)]//
/* (non-Javadoc) x9S~ns+r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @%Y$@Qb{
*/ ?/"Fwjau
public void sort(int[] data) { @vzv9c[
MaxHeap h=new MaxHeap(); bV c"'RQ
h.init(data); d7 |3A
for(int i=0;i h.remove(); b.HfxYt(
System.arraycopy(h.queue,1,data,0,data.length); '4 T}$a"i
} W$&{jr-p
j"g[qF/*
private static class MaxHeap{ RMJq9a
o"h*@.
void init(int[] data){ -pEt=
this.queue=new int[data.length+1]; 2P)*Y5`KBH
for(int i=0;i queue[++size]=data; XIQfgrGZ
fixUp(size); >a;0<Ui&Q
} K??(>0Qr}r
} fsd,q?{a:
ig G8L
private int size=0; v&}+ps_W
g=iPv3MG
private int[] queue; P]V/<8o.53
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public int get() { l6o?(!:!%
return queue[1]; 4rXjso|
} bEx8dc`Q
-<e8\Z`
public void remove() { $'m&RzZ
SortUtil.swap(queue,1,size--); |Uf[x[
fixDown(1); lM0`yh
} qU!xh)
file://fixdown )1de<# qM
private void fixDown(int k) { *WS'C}T
int j; +-8u09-F
while ((j = k << 1) <= size) { ^)-* Ubzz
if (j < size %26amp;%26amp; queue[j] j++; St9+/Md=jQ
if (queue[k]>queue[j]) file://不用交换 H{&o_
break; f(=3'wQ
SortUtil.swap(queue,j,k); 8&d s
k = j; 2RW^Nqc9
} ,UOAGu<_gb
} ?r< F/$/
private void fixUp(int k) { ~Ey)9phZK
while (k > 1) { w?u4-GT
int j = k >> 1; X0G Mly
if (queue[j]>queue[k]) h5@v:4Jjo~
break; #f*,mY|>
SortUtil.swap(queue,j,k); E]Wnl\Be
k = j; <<Zt.!hS
} $inpiO|s
} mv%Zh1khn/
2y_R05O0
} zpPzXQv]/
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} Ky6.6Y<.|
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SortUtil： +Ndo$|XCy]
^LaOl+;S
package org.rut.util.algorithm; I@sXmC2$\
%+>t @F,GM
import org.rut.util.algorithm.support.BubbleSort; Z:TW{:lrI
import org.rut.util.algorithm.support.HeapSort; MXQS6F#
import org.rut.util.algorithm.support.ImprovedMergeSort; .W[[Z;D
import org.rut.util.algorithm.support.ImprovedQuickSort; \a\J0&Z
import org.rut.util.algorithm.support.InsertSort; C3m](%?
import org.rut.util.algorithm.support.MergeSort; -;VKtBXP</
import org.rut.util.algorithm.support.QuickSort; 0/r\#"+XT
import org.rut.util.algorithm.support.SelectionSort; D7'P^*4_B
import org.rut.util.algorithm.support.ShellSort; FNQR sNi
f76bEe/B9
/** Ds}ctL{6"
* @author treeroot J~\`8cds
* @since 2006-2-2 O(P ,!
* @version 1.0 627xR$U~
*/ M@R_t(&=
public class SortUtil { 7mUpn:U
public final static int INSERT = 1; J}c`\4gD
public final static int BUBBLE = 2; d{~5tv- H
public final static int SELECTION = 3; Ng;K-WB\
public final static int SHELL = 4; p-KMELB
public final static int QUICK = 5; QH?}uX'x)G
public final static int IMPROVED_QUICK = 6; pONBF3H8
public final static int MERGE = 7; n\U3f M>N
public final static int IMPROVED_MERGE = 8; GpW5)a
public final static int HEAP = 9; zVSbEcr,C~
VaLx-RX
public static void sort(int[] data) { ^5"2s:vP
sort(data, IMPROVED_QUICK); j|WuOZm\0
} ~-1!?t/%
private static String[] name={ X={n9*Sd8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aP%&-W$D|
}; !W^b:qjJ
?2;gmZd7
private static Sort[] impl=new Sort[]{ )v4?+$g
new InsertSort(), @R!f(\
new BubbleSort(), 9`3%o9V9Y
new SelectionSort(), n'dxa<F2|
new ShellSort(), /1h 0l;
new QuickSort(), 01UEd8
new ImprovedQuickSort(), 6b-j
new MergeSort(), |.]:#)^X?
new ImprovedMergeSort(), ,gvv297
new HeapSort() ,+iREh;
}; (l|:$%[0
.x 1&
public static String toString(int algorithm){ g?(h{r`
return name[algorithm-1]; c]qq *k#
} GMY"*J<E
8T}Ycm5}
public static void sort(int[] data, int algorithm) { ,mu=#}a@}
impl[algorithm-1].sort(data); ~|LlT^C
} H;&^A5
N*k`'T
public static interface Sort { YW|KkHi*
public void sort(int[] data); D~KEjz!bQ
} U[!x 0M
%E!^SF?Y
public static void swap(int[] data, int i, int j) { E7XFt#P.
int temp = data; $LS$:%i4
data = data[j]; ,ZVC@P,L
data[j] = temp; `M "O #
} U1+X!&OCp
} QQ+?J~